Latin word statim comes from Latin sto, Latin -tim (Forms adverbs from adjectives.)

Detailed word origin of statim

Dictionary entry	Language	Definition
sto	Latin (lat)	(Medieval Latin) I [currently] am (feel). (Medieval Latin) I am [located at]. I stand. I stay, remain.
-tim	Latin (lat)	Forms adverbs from adjectives.
statim	Latin (lat)	At once, immediately. Then (at that time).

Words with the same origin as statim