夜のとばりが下りつつある。

evening; night

indicates possessive; nominalizes verbs and adjectives; substitutes for "ga" in subordinate phrases; (at sentence-end, falling tone) indicates a confident conclusion; (at sentence-end) indicates emotional emphasis; (at sentence-end, rising tone) indicates question

if; when; and; with; particle used for quoting (with speech, thoughts, etc.); quoting particle; promoted pawn; indicates question (sentence end)

burr (e.g. on a machined edge)

indicates sentence subject (occasionally object); indicates possessive (esp. in literary expressions); but; however; still; and

to descend (e.g. a mountain); to go down; to come down; to alight (e.g. from bus); to get off; to disembark; to dismount; to step down; to retire; to give up; to quit; to be granted; to be issued; to be given; to form (of frost, dew, mist, etc.); to be passed (from the body; e.g. of a roundworm)

while; even though; despite

to be (usu. of inanimate objects); to exist; to live; to have; to be located; to be equipped with; to happen; to come about