FROM STRONG’S HEBREW DICTIONARY (1890)

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

yacaph yaw-saf' — a primitive root; to add or augment (often adverbial, to continue to do a thing):--add, X again, X any more, X cease, X come more, + conceive again, continue, exceed, X further, X gather together, get more, give more-over, X henceforth, increase (more and more), join, X longer (bring, do, make, much, put), X (the, much, yet) more (and more), proceed (further), prolong, put, be (strong-) er, X yet, yield.