三々, 三三:

a type of military boat used between the Warring States Period and the Edo Era

(historical) a mountain checkpoint west of Kyoto, bordering the ancient provinces of Yamashiro and Omi

Shanhai Pass

the lock and key for a gate

to close and lock a gate

参加: participation / 酸化: oxidation, combustion / 惨禍: catastrophe, disaster / 傘下: subsidiary / 産科: obstetrics / 賛歌, 讃歌, 讚歌: song of praise, hymn, paean / 山家: mountain villa

酸化: oxidize, become oxidized / 参加: participate, join, take part

A title used after person's name (first name or surname) regardless of sex; Mr, Ms, Mrs, Miss. Also used after a job title and a company name. / (colloquial) Used after a shop name.

三角形: triangle