dispense with

1.  Manage without, forgo, as in We can dispense with the extra help. Shakespeare had this idiom in Timon of Athens (3:2): "Men must learn now with pity to dispense." ]c. 1600]
2.  Get rid of, do away with, as in The European Union is trying to dispense with tariff barriers. [Late 1500s]
3.  Exempt one from a law, promise, or obligation, as in He asked the court to dispense with swearing on the Bible. This usage originally applied to religious obligations (to which the Pope granted dispensation). [Early 1500s]

Definition: omit; do away with
Antonyms: accept, keep, regard, retain, take, use

The verb has 3 meanings:

Meaning #1: to give up as not strictly needed: he asked if they could spare one of their horses to speed his journey.
  Synonyms: spare, give up, part with

Meaning #2: do without or cease to hold or adhere to
  Synonyms: waive, relinquish, forgo, foreswear

Meaning #3: forgo; do or go without