Profuse means there is a very large amount of something — so much that it feels as if it is pouring out. The word likes certain partners. People talk of profuse sweating (you are soaked), profuse bleeding (a lot of blood), profuse apologies, profuse thanks, or profuse praise — they keep giving them, almost too many. Flowers can be profuse in spring. Though actually, it is not a calm word for ‘many’. A shelf with many books is not ‘profuse books’. You use it when something overflows: liquid, feeling, flowers, words of thanks. It is a little formal. In speech, a lot of, pouring, or soaking wet will do for sweat; endless for apologies. There is a rare old verb to profuse, ‘to pour out’, but learners almost only meet the adjective.

大量的、豐富的（常指汗、血、道歉、稱讚，有「湧出來」的感覺）