General Roots and Prefixes
Root or Prefix
Meaning
Examples
a, an
not, without
atheist, anarchy, anonymous apathy, aphasia, anemia, atypical, anesthesia
ab
away, down, from, off
absent, abduction, aberrant, abstemious, abnormal, abstract, absorb
acro
high, tip, top
acrobat, acrophobia, acronym, acromegaly, acropolis
act
do, move
action, react, transaction, proactive, activity, activation, deactivate
ad
to, toward
admit, addition, advertisement, adherent, admonish, address, adhesive, adept, adjust
alt
high
altitude, altimeter, alto, contralto, altocumulus, exalt
ambul
to walk
ambulatory, amble, ambulance, somnambulist, perambulate, preamble
Subjunctive (I suggest you do)