Is it ensure, insure, or assure?
Old English stream "a course of water," from Proto-Germanic *straumaz (cf. Old Saxon strom, Old Norse straumr, Danish strøm, Swedish ström, Norwegian straum, Old Frisian stram, Dutch stroom, Old High German stroum, German Strom "current, river"), from PIE root *sreu- "flow" (see rheum). Meaning "current in the sea" (e.g. Gulf Stream) is recorded from late 14c. Stream of consciousness in lit crit first recorded 1931, originally in psychology (1855).
early 13c., from stream (n.). Related: Streamed; streaming.
streaming stream·ing (strē'mĭng)
Relating to information that is transmitted in real time over the Internet, instead of being sent first as a file and then opened after it has been downloaded.