彼らの勉強を邪魔された。

they (usually male); them

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

study; diligence; discount; reduction

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.

hindrance; obstacle; nuisance; to visit (somebody's home); demon who hinders Buddhist training; demon who obstructs sentient beings from maintaining moral behaviour