Latin word instare comes from Latin stare, Latin ingratus (Thankless. Ungrateful. Unpleasant, disagreeable.)

Detailed word origin of instare

Dictionary entry	Language	Definition
stare	Latin (lat)
ingratus	Latin (lat)	Thankless. Ungrateful. Unpleasant, disagreeable.
instare	Latin (lat)

Words with the same origin as instare