alert
‘on the look-out, vigilantly attentive, watchful’
Lexical development traced from the Tamil root:
E. alerte < F. alerte ‘vigilant’ < à l'erte ‘on the watch’ < Ital. all’erta ‘to the height’ < all + erta ‘lookout’ < ergere < Lat. erigere ‘raise’ < e- + regere ‘direct, guide’ < uht < reg- < Tamil aracaṉ