Latin word sustinere comes from Latin teneo, Latin sub- (Sub-.)

Detailed word origin of sustinere

Dictionary entry	Language	Definition
teneo	Latin (lat)	(of laws) I am binding on; bind, hold, obligate. (reflexive) I keep back, remain, stay, hold position. I comprise, contain, include, hold. I hold fast, restrain, detain, check, control; bind, fetter. I hold, have; grasp. I insist, uphold. I know, grasp, understand, conceive. I possess, occupy, control. I reach, attain; gain, acquire, obtain. I recollect, retain knowledge of, remember, bear [...]
sub-	Latin (lat)	Sub-.
sustinere	Latin (lat)

Words with the same origin as sustinere