tack

tack on

verb

Definition of TACK

to join (something) to a mass, quantity, or number so as to bring about an overall increase <the ticket agency tacked on a hefty surcharge to what was already a hefty price for the theater tickets>

Synonyms adjoin, annex, append, subjoin, tack (on)

Related Words affix, attach, fasten, fix, graft, hitch, tag, tie; infuse, inject, insert, interfuse, introduce; aggrandize, amplify, augment, beef (up), boost, compound, enlarge, escalate, expand, extend, increase, multiply, raise, swell up; elongate, lengthen, prolong, protract; enhance, heighten, intensify, magnify; complement, supplement, supply; enforce, reinforce (also reenforce), strengthen; maximize

Near Antonyms detach, disconnect, disjoin, separate, unfasten; amputate, cut, excise, lop (off), sever; contract, decrease, diminish, lessen, lower, reduce; abbreviate, abridge, curtail, shorten; compress, condense, constrict, cut back, retrench

Antonyms abate, bate, deduct, knock off, remove, subtract, take off