Unit Two: VocabularyCOMMON ROOTS

To do, drive

ACTION, ACTOR, REACT, ENACT

act

Year

Annual, perennial, bicentennial

ann, enn

Star

Astronomy, astronomical, asterisk

aster, astro

To hear

Audience, auditorium, audible

aud

Life

Biology, biochemistry, biodegradable

bio

To yield

Intercede, concede, secede

cede

Time

Chronology, chronometer, chronoscope

chrono

Around

Circumference, circle, circular, circumvent

circ, circum

To trust, believe

Credible, incredible, credit, credential

cred

People

Democracy, demographic, epidemic

dem