solder
‘cement made of fusible metal’
Lexical development traced from the Tamil root:
E. soulder, sawder, sauder, soudre, souder < M.E. souden, sowden ‘to strengthen’ < O.F. solder ‘to consolidate, close, fasten together, join with solder’ < Lat. solidare ‘to make solid’ < solidus ‘solid’ < saw < sol- < Tamil iṟai