Meaning

noun the process of using your mind to consider something carefully

verb judge or regard; look upon; judge

verb expect, believe, or suppose

originFrom Middle English thenkinge, þinkynge, þenkynge, þenchinde, from Old English þenċende, from Proto-Germanic *þankijandz, present participle of *þankijaną (“to think”), equivalent to think + -ing. Cognate with Dutch denkend (“thinking”), German denkend (“thinking”), Swedish tänkande (“thinking”).

Etymology from Wiktionary, CC BY-SA 3.0