Synonyms for Abridge:

n.

abridge (noun)
foreshorten, reduce, cut, abbreviate, shorten, contract.
digest (noun)
study atshorten.

v.

contract (verb)
squeeze, wither, condense.
decrease (verb)
recede, compact, erode, deflate, deduct, decrease, contract, concentrate, compress, abate, die down, truncate, abbreviate, shrink, lower, lessen, subside, dwindle, decrement, drain, diminish, deplete, shorten, curtail.
diminish (verb)
prune, pare, crop, weed, shear, nip, downgrade, lighten, taper, shave, trim, clip, minimize, reduce, cull, bob.
shorten (verb)
belittle.
subtract (verb)
dock, delete, discount, elide, cut, subtract, depreciate.

Other synonyms:

contract
recede.
lessen
die down.
shorten
elide, truncate, abbreviate.
Other relevant words:
foreshorten.