100 Important Prefix and Suffix Words List | 10th Std English Grammar

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Communication Skills in English for Engineers and Technologists


Here is a comprehensive list of 100 root words with their Prefix and Suffix forms. This list is curated specifically for the 10th Standard Board Exam (Question 1. B).

Comprehensive List of Root Words, Prefixes, and Suffixes for SSC English

100 Root words with prefix and suffix list for SSC Board Exam Class 10 English Grammar Question 1B


In the SSC Board Activity Sheet, Question 1(B) often asks students to make new words by adding a prefix or suffix. This list covers the most common words asked in the exam.

Important Spelling Rules for Word Formation

1. Dropping the Silent 'e'

(Add text: When adding a suffix starting with a vowel, drop the 'e' at the end. Example: Nature + al = Natural.)

2. Changing 'y' to 'i'

(Add text: If a word ends in 'y', change it to 'i' before adding a suffix. Example: Happy + ness = Happiness.)

3. Doubling the Final Consonant

(Add text: Sometimes the last letter is doubled. Example: Run + er = Runner.)

4. Adding Prefixes (No Change Rule)

When you add a prefix (like un-, dis-, mis-, ir-) to a root word, the spelling of the root word usually does not change. Even if this results in double letters, keep both.

  • Mis + spell = Misspell (Double 's')

  • Ir + regular = Irregular (Double 'r')

  • Un + necessary = Unnecessary (Double 'n')

  • Dis + appear = Disappear (One's, two 'p's)

5. The Silent 'e' Rule

This is one of the most important rules for suffixes.

  • Drop the 'e': If the suffix begins with a vowel (a, e, i, o, u, y), drop the 'e' at the end of the root word.

    • Write + ing = Writing

    • Nature + al = Natural

    • Create + ion = Creation

  • Keep the 'e': If the suffix begins with a consonant (like -ly, -----ment, -ful), keep the 'e'.

    • Hope + ful = Hopeful

    • Manage + ment = Management

    • Late + ly = Lately

6. The 'Y' Rule (Consonant vs. Vowel)

  • Change 'y' to 'i': If a word ends in a Consonant + y, change the 'y ' to 'i ' before adding the suffix (unless the suffix is -ing).

    • Happy + ness = Happiness

    • Carry + ed = Carried

    • Beauty + ful = Beautiful

    • (Exception: Carry + ing = Carrying)

  • Keep the 'y': If a word ends in a Vowel + y (ay, ey, oy), do not change the 'y'.

    • Play + ed = Played

    • Enjoy + ment = Enjoyment

7. The Doubling Rule (CVC Rule)

Double the last letter of the root word if it satisfies these conditions:

  1. The word ends in CVC (Consonant-Vowel-Consonant).

  2. The suffix begins with a vowel.

  • Run + er = Runner (r-u-n is CVC)

  • Big + est = Biggest

  • Sad + est = Saddest

  • Begin + er = Beginner

8. The 'Full' Rule

When the word "Full" is added as a suffix to another word, the second 'l' is always dropped.

  • Beauty + full = Beautiful (Not Beautifull)

  • Use + full = Useful

  • Faith + full = Faithful

9. Keeping 'e' for Soft sounds (CE and GE)

If a word ends in -ce or -ge, keep the 'e' when adding suffixes like -able or -ous to keep the sound soft (like 's' or 'j').

  • Courage + ous = Courageous (Keeps the 'j' sound)

  • Change + able = Changeable

  • Notice + able = Noticeable

Note: In the exam, you usually only need to write one (either prefix or suffix), but knowing both helps.


Other related posts:

translation of words, phrases and proverbs

The Complete List of 100 Words for Word Formation


List of 100 Prefix and Suffix Words for SSC Exam
Sr. No. Root Word Prefix Form Suffix Form
1HappyUnhappyHappiness / Happily
2PossibleImpossiblePossibility
3LuckyUnluckyLuckily
4KindUnkindKindness
5RegularIrregularRegularity
6CompleteIncompleteCompletion / Completely
7CorrectIncorrectCorrection / Correctly
8AppearDisappearAppearance
9AgreeDisagreeAgreement
10HonestDishonestHonesty
11LikeDislikeLikely / Likeness
12LegalIllegalLegally
13PoliteImpolitePoliteness
14VisibleInvisibleVisibility
15UnderstandingMisunderstandingUnderstandable
16ManageMismanageManagement / Manager
17UseMisuse / ReuseUseful / Useless
18Care-Careful / Careless
19Hope-Hopeful / Hopeless
20Help-Helpful / Helpless
21JoyEnjoyJoyful
22ComfortDiscomfortComfortable
23CourageDiscourage / EncourageCourageous
24FriendBefriendFriendly / Friendship
25SuccessUnsuccessfulSuccessful / Fully
26PowerEmpowerPowerful / Powerless
27CleanUncleanCleanliness
28SafeUnsafeSafety
29SureUnsureSurely / Surety
30KnownUnknownKnowledge
31RealUnrealReality / Really
32PureImpurePurity
33ActiveInactiveActivity / Action
34DirectIndirectDirection / Director
35ConnectDisconnectConnection
36RespectDisrespectRespectful
37OrderDisorderOrderly
38FaithUnfaithfulFaithful
39BelieveDisbelieveBelievable
40MoveRemoveMovement / Movable
41CountDiscountCountable / Counter
42PlayReplayPlayer / Playful
43WriteRewriteWriter / Writing
44ActReact / EnactActor / Action
45LargeEnlargeLargely
46RichEnrichRichness
47DangerEndangerDangerous
48CircleEncircleCircular
49AbleUnableAbility
50StableUnstableStability
51EqualUnequalEquality
52MortalImmortalMortality
53PatientImpatientPatience
54PerfectImperfectPerfection
55MatureImmatureMaturity
56DependentIndependentDependence
57FormalInformalFormality
58JusticeInjusticeJustify
59SufficientInsufficientSufficiency
60ValidInvalidValidity
61LogicalIllogicalLogically
62LiterateIlliterateLiteracy
63RelevantIrrelevantRelevance
64ResponsibleIrresponsibleResponsibility
65RationalIrrationalRationally
66BehaveMisbehaveBehaviour
67GuideMisguideGuidance
68JudgeMisjudgeJudgment
69LeadMisleadLeader / Leadership
70TrustDistrustTrustworthy
71ObeyDisobeyObedient
72ContinueDiscontinueContinuous
73SatisfyDissatisfySatisfaction
74ChargeRecharge / DischargeCharger
75PackUnpackPackage / Packet
76LockUnlockLocker
77LoadUnload / OverloadLoading
78CoverUncover / DiscoverCoverage
79FoldUnfoldFolder
80HealthyUnhealthyHealth
81Punish-Punishment
82Develop-Development
83AppointDisappointAppointment
84Assign-Assignment
85Educate-Education
86Celebrate-Celebration
87Imagine-Imagination / Imaginary
88InformMisinformInformation
89CreateRecreateCreation / Creative
90Dark-Darkness
91Sad-Sadness
92Weak-Weakness
93Bright-Brightness / Brightly
94Soft-Softness / Softly
95Quick-Quickly
96Slow-Slowly
97DifferIndifferentDifferent / Difference
98Confide-Confidence
99Ignore-Ignorance
100Attend-Attendance / Attention


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