Italian word stendere comes from Latin tendo, Latin ingratus (Thankless. Ungrateful. Unpleasant, disagreeable.)

Detailed word origin of stendere

Dictionary entry	Language	Definition
tendo	Latin (lat)	I pitch (a tent).. I proceed.. I stretch, stretch out, distend, extend.. I strive for; I reach for.
ingratus	Latin (lat)	Thankless. Ungrateful. Unpleasant, disagreeable.
intendo	Latin (lat)	(Medieval Latin) I obey (+ dative). (New Latin) I understand. I aim, turn, direct.. I intend to. I stretch out, stretch, strain.. I turn my attention to, focus (on).
întinde	Romanian (ron)	(reflexive) to stretch oneself; also, to lie down. To spread out, lengthen out, stretch out, widen. To stretch, lengthen.
extendo	Latin (lat)	I enlarge or increase. I extend, prolong or continue. I stretch or thrust out.
stendere	Italian (ita)	To draw up. To floor (a person, with a blow). To hang out (washing). To roll out (pasta). To spread (a table etc). To stretch out (one's arms etc).

Words with the same origin as stendere