sunday
‘first day of the week’
Lexical development traced from the Tamil root:
E. zindei, sondaie, sundaye, sondai, sounndey, zonday, sunnedaie, soneday, sonedæi, sunnadaȝum, sunnedæȝ, sunnadæg, sunneðagana, synnadæg < M.E. son-dai < O.E. sunnandæg ‘day of the sun’ < sunnan < O.E. sunne ‘the sun’ < Proto-G. sunno < s(u)wen + dæg ‘day’ - < suh < sawel- < Tamil el