(literary) they

to make a secret agreement

a secret agreement

tie (a string, rope, sash, etc.) / connect / be bound (by love, friendship, etc.) / enter a contract, form an alliance / wrap up, wind up / conclude, end

past tense and perfective aspect of 結ぶ (musubu) [godan]

secret

secret

back; behind; other side / inside / reverse side of a coin ("tails") / (baseball) bottom (of an inning)

reverse side / back / other side

to bear fruit