שָׁכַח

From LSJ

τὰ ἀφανῆ τοῖς φανεροῖς τεκμαίρου → analyze the unknown based on the known

Source

English (Strong)

or shakeach; a primitive root; to mislay, i.e. to be oblivious of, from want of memory or attention: X at all, (cause to) forget.