Dictionary: Strong's Hebrew & Greek Dictionary
eido i'-do a primary verb; used only in certain past tenses, the others being borrowed from the equivalent 3700 and 3708; properly, to see (literally or figuratively); by implication, (in the perfect tense only) to know:
be aware, behold,can (+ not tell), consider, (have) know(-ledge), look (on), perceive, see, be sure, tell, understand, wish, wot. Compare 3700.