子供はたばこを吸うのを禁じられている。

child; children

topic marker particle; indicates contrast with another option (stated or unstated); adds emphasis

tobacco; cigarette; cigaret; cigar; tobacco plant (Nicotiana tabacum)

indicates direct object of action; indicates subject of causative expression; indicates an area traversed; indicates time (period) over which action takes place; indicates point of departure or separation of action; indicates object of desire, like, hate, etc.

to smoke; to breathe in; to inhale; to suck; to sip; to slurp; to absorb; to soak up; to kiss

indicates possessive; nominalizes verbs and adjectives; substitutes for "ga" in subordinate phrases; (at sentence-end, falling tone) indicates a confident conclusion; (at sentence-end) indicates emotional emphasis; (at sentence-end, rising tone) indicates question

to prohibit