亜酸化窒素: nitrous oxide

山中: being in the mountains or woods

十三日: thirteenth day of the month

to shorten, to shrink, to contract, to shrivel

(Chinese astronomy) the Girl constellation, one of the Twenty-Eight Mansions

(historical) suffixed to names of female figures in the Edo period

(pathology) hemorrhoids, piles

a road, a street / attaches to place names, indicating a road to that place / attaches to a time duration, indicating a trip taking that length of time

(colloquial) so, then—used for connecting to a reasonable conclusion, supposition

well; then; so / by extension from the "so then" meaning: bye, goodbye