Lesson 19 AffixesToday we will learn to define words based on what their prefixes mean.

Definition of affix = a part of a word stuck at the front or the back to change its meaning

Example = wife changes to ex-wife Marine changes to sub-marine

A prefix goes at the beginning A prefix goes at the beginning of a word, such as:of a word, such as:

Re-charge

Un-lock

Sub-way

A suffix goes at the back of a word, such as:

Histor-ical

Psych-ology

Incarcer-ation

Sub- (under)Sub- (under)SubstandardSubstandard

SubmarineSubmarine

SubordinateSubordinate

SubliminalSubliminal

SubmergeSubmerge

SubmitSubmit

SubwaySubway

SubstituteSubstitute

Con- (together)Con- (together)ConferenceConferenceConventionConventionConfederationConfederationConspiracyConspiracyConnectionConnectionConsistencyConsistencyCongregationCongregationConcertConcert

-ectomy (removal)-ectomy (removal)

TonsillectomyTonsillectomy

AppendectomyAppendectomy

LumpectomyLumpectomy

CystectomyCystectomy

-ology (study of)-ology (study of)PsychologyPsychologySociologySociologyBiologyBiologyGenealogyGenealogyAstrologyAstrologyCosmetologyCosmetologyEgypttologyEgypttologyCardiologyCardiology

Pre- (before)Pre- (before)Pre-gamePre-gamePrematurePrematurePreseasonPreseasonPredecessorPredecessorPredictionPredictionPrearrangedPrearrangedPrecautionPrecautionPrefacePreface

Auto- (self)Auto- (self)

AutographAutobiography

Sub-Sub- means UNDER

examples: subway, submarine, substandard

Use your composition book to…

Write the answers, not the questions to, handout packet “Vocabulary Practice 1: Prefixes”

Do not write in the packet

Tonight’s homework is:

Handout worksheet “Prefix Match”