τὰ ἀφανῆ τοῖς φανεροῖς τεκμαίρου → analyze the unknown based on the known
from כָּבַד; heavy; figuratively in a good sense (numerous) or in a bad sense (severe, difficult, stupid): (so) great, grievous, hard(-ened), (too) heavy(-ier), laden, much, slow, sore, thick.
