solemn
‘devout’
Lexical development traced from the Tamil root:
E. solen, sollem, solemne, sol(l)empe < O.F. solempne, solemne < Mod.F. solennel < Lat. sollemnis, sollempnis ‘annual, established, religiously fixed, formal, ceremonial, traditional’ < sollus ‘whole, unbroken, complete’ < sol < sol- < Tamil iṟai