gain, profit, benefit / gain (factor by which signal is multiplied)

to score, to gain points

family headship

a privilege, a special right or benefit

a surname

Synonym of 毒素 (dokuso, “toxin”)

(Internet slang) literally who would want this

Vietcong

what number, how many (used with a counter) / (used with も) many (used with a counter)

the south / Short for 南鐐 (nanryō): beautiful silver; a type of silver coin in the Edo period