FROM STRONG’S HEBREW DICTIONARY (1890)

Strong’s Hebrew Dictionary (1890) — public domain, printed whole.

`atsar aw-tsar' — a primitive root; to inclose; by analogy, to hold back; also to maintain, rule, assemble:--X be able, close up, detain, fast, keep (self close, still), prevail, recover, refrain, X reign, restrain, retain, shut (up), slack, stay, stop, withhold (self).