tres, three.

trescientos -as, three hundred.

trigo, m., wheat, grain.

trimestre, m., three months.

trinar, to trill, warble.

trino, m., trill, warbling.

triste, sad, mournful, gloomy, dull.

tristemente, sadly.

tristeza, f., sadness, sorrow.

tristísimo -a (from triste), very sad.