to lock (a door, etc.) / (Internet slang) (of a SNS account) to change privacy setting to limited people and posts and/or profiles can be seen by limited people.

(idiomatic) to hold the key (to)

鉤虫: velvet worm

velvet worm

key

(chiefly Buddhist) a temple

to penetrate / to dedicate oneself

(archaic) one's own father

he/she/I/they/we said: a type of verbal quotation mark used for direct and indirect quotes, also similar to that when used as a coordinating conjunction / used to emphasize a word

Used to draw attention to something objectionable in a discussion.