"soft, easily injured," early 13c., from O.Fr. tendre "soft, delicate, tender" (11c.), from L. tenerem (nom. tener) "soft, delicate, of tender age," from PIE *ten- "stretch" (see tenet). Meaning "kind, affectionate, loving" first recorded c.1300. Meaning "having the delicacy of youth, immature" is attested from early 14c. Tender-hearted first recorded 1530s. The verb tenderize is attested from 1733; specifically of food, recorded by 1935, originally Amer.Eng.; tenderizer is recorded from 1958.
"to offer formally," 1542, from M.Fr. tendre "to offer, hold forth" (11c.), from L. tendere "to stretch, extend" (see tenet). The retention of the ending of the M.Fr. infinitive is unusual. The noun meaning "formal offer" is from 1542; specific sense of "money that may be legally offered as payment" is from 1740.
"person who tends another," c.1470, probably an agent noun formed from M.E. tenden "attend to" (see tend (2)); later extended to locomotive engineers (1825) and barmen (1883). The meaning "small boat used to attend larger ones" first recorded 1675.