General "Away From" or "Not"
* absent: not present
* abnormal: not normal
* abolish: to do away with
* abrupt: sudden and unexpected
* absurd: ridiculous
* abuse: misuse
* abhor: to hate strongly
* abstain: to refrain from
* abstract: theoretical, not concrete
* absurd: illogical or ridiculous
Related to Location or Movement
* abroad: in a foreign country
* abduct: to kidnap
* aberrant: deviating from the norm
* abeyance: a state of temporary inactivity
* aboriginal: native to a place
Related to Time
* abate: to become less intense
* abide: to endure or tolerate
* abject: utterly miserable
* abjure: to renounce or give up
* abrogate: to abolish or repeal
Other
* abrogate: to abolish or repeal
* abrogate: to abolish or repeal
* abysmal: extremely bad
* abrupt: sudden and unexpected
* abstruse: difficult to understand
* abundant: plentiful
* aboriginal: native to a place
This is just a small selection. There are many other words with the prefix "ab." Remember that prefixes can change the meaning of a word, so it's always helpful to check the dictionary to be sure.