English word maintain comes from Latin tentare, Latin manu, Latin manus tenere, and later Latin manuteneo ((Late Latin, Vulgar Latin) I support, maintain.)

Detailed word origin of maintain

Dictionary entry	Language	Definition
tentare	Latin (lat)
manu	Latin (lat)
manus tenere	Latin (lat)
manuteneo	Late Latin (LL)
manuteneo	Latin (lat)	(Late Latin, Vulgar Latin) I support, maintain.
maintenir	Old French (842-ca. 1400) (fro)	To maintain (to keep the same).
maintain	English (eng)	(obsolete, transitive) To support (someone), to back up or assist (someone) in an action. [14th-19thc.]. To declare or affirm (a clause) to be true; to assert. [from 15thc.]. To keep up; to preserve; to uphold (a state, condition etc.). [from 14thc.].

Words with the same origin as maintain