settle (on)தீர்மானிtīrmāṉi(tiirmaani)(6b intr)arrange or fix definitely as desired: put into order; agree; fix (a date, time, etc.)
Usage:
செவ்வாய்க்கிழமை போகலாம் என்று தீர்மானித்தோம்cevvāykkiḻamai pōkalām eṉṟu tīrmāṉittōm
sevvaakkeḻame poohalaamṇṇu tiirmaaniccoom
We settled on Tuesday as the day we would go there.