abbreviate
ab-bre-vi-ate
verb
To shorten a word or phrase, often by omitting letters.
"Please abbreviate 'Doctor' to 'Dr.' on the form."
Thesaurus
Synonyms: contract, shorten, reduce, cut, foreshorten, abridge
Antonyms: dilate, elaborate, enlarge, expand, expatiate, exposit, expound, flesh out, lucubrate