Here is a word-for-word breakdown of the mantra:
tat–that (God)
savitur–of the sun
varenyam–the best
bhargo (bhargas)–light, illumination
devasya–divine
dhimahi–let us meditate (a verb)
dhiyo (dhiyah)–thought(s)
yo (yah)–which
nah–of us, our
pracodayat–May it push, inspire (a verb)
