(television, video websites) subchannel

(broadcasting) channel (specific radio frequency or band of frequencies)

substitute / submarine (undersea boat) / (broadcasting) Short for サブコントロールルーム (sabu-kontorōru rūmu).

sub-

movie, film

to see, to watch, to observe, to look at something / to look over, to examine, to judge / to take care of, to look after, to keep an eye on somebody

(chiefly women's speech) first person singular pronoun: I, me

disgraceful, shameful, indecent / shabby, unsightly

(fiction) subcharacter

(polite) first-person singular pronoun: I, me