observe
'watch over’
Lexical development traced from the Tamil root:
E. obsarve, obserff, obserwe, obsarve, obcerue, upserve, abserue, obsirue < O.F. observer, osserver ‘to observe, watch over, follow’ < Lat. observare ‘watch over’ < ob ‘in front of, before’ + servare ‘to watch, keep safe’ < zuhv < ser- < Tamil iṟai