Latin word retineo comes from Latin re-, Latin tentare

Detailed word origin of retineo

Dictionary entry	Language	Definition
re-	Latin (lat)	Again; prefix added to various words to indicate an action being done again, or like the other usages indicated above under English.. Back, backwards.
tentare	Latin (lat)
retineo	Latin (lat)	I hold fast, maintain, preserve, protect, guard, retain.. I hold in check, repress, check, stop, stay.. I keep or hold back, detain, restrain, retain, confine, contain; delay.

Words with the same origin as retineo