Synonym: in, inside. Antonym: without. Similar words: writhing, thin, thing, think, nothing, think up, think out, think of. Meaning: [wɪ'ðɪn ,-θɪn /wɪ'ðɪn] 
adv. on the inside.
adv. on the inside. 181. If you do not pay within 28 days, interest will accrue.
182. She wanted to give vent to the fury boiling within her.
183. She rose to the top of her profession within ten years.
More similar words: writhing, thin, thing, think, nothing, think up, think out, think of, anything, clothing, nothing but, think over, anything but, breathing, something, think twice, everything, with, something of, without, do with, go with, something else, something like, down with, cope with, withdraw, live with, deal with, meet with.