山登り: mountain climbing

Eggcorn of 止むを得ない (yamu o enai, “have no choice but to”).

Eggcorn of 止むを得ない (yamu o enai, “have no choice but to”).

Alternative spelling of 止むを得ない (yamu o enai, “have no choice but to”)

Alternative form of 止むを得ない (yamu o enai, “have no choice but to”)

(dated, now dialectal) indicating light polite assertive

the most one can do

depressed cowry, Mauritia depressa

"Historical kana usage", a prescriptive method of using kana to write Japanese. Devised in the Edo period by Keichū (契沖) and taught in schools until 1946, it aims to be etymologically faithful and reflects earlier stages of the language (Heian period and earlier).

revisionism