彼らがお互いに愛し合っているのを僕は知っている。

Sentence Analyzer

English Translation

I know they are in love with each other.

Furigana

彼(かれ)らがお互(たが)いに愛(あいあ)し合()っているのを僕(ぼく)は知(し)っている。

Romanji

Karera ga otagai ni aishiatteiru no o boku wa shitteiru.

Words

彼ら (かれら)

they (usually male); them

が (が)

indicates sentence subject (occasionally object); indicates possessive (esp. in literary expressions); but; however; still; and

お互い (おたがい)

mutual; reciprocal; each other

に (に)

at (place, time); in; on; during; to (direction, state); toward; into; for (purpose); because of (reason); for; with; by; from; as (i.e. in the role of); per; in; for; a (e.g. "once a month"); and; in addition to; if; although

愛し合う (あいしあう)

to love one another; to be affectionate towards each other; to have sex; to make love

の (の)

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

を (を)

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.

僕 (ぼく)

I; me; you; manservant

は (は)

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

知る (しる)

to be aware of; to know; to be conscious of; to cognize; to cognise; to notice; to feel; to understand; to comprehend; to grasp; to remember; to be acquainted with (a procedure); to experience; to go through; to learn; to be acquainted with (a person); to get to know; to concern