infertile land.

soot (fine particles of amorphous carbon and tar) / sooted dirt or dust accumulated in ceilings, walls, etc. / Short for 煤色 (susuiro): a shade of black as in the color of soot

wait for / wait until / as soon as

a type of millet

Contraction of です.

(colloquial, informal) informal polite marker, attaching to the non-polite form at the end of a sentence, ruder than regular polite forms です (desu) and ます (-masu)

key (to open a lock) / the clue to a problem / key (on the keyboard of a piano etc.) / key (on the keyboard of a computer) / key (a pitch in music)

chi

disgraceful, shameful, indecent / shabby, unsightly

advance, make progress, enter