合作: collaboration

合作:する: to collaborate

to adore, to be sweet on / (ironically, from the idea of giving special attention to) to persistently bother or annoy someone, to be a noodge to someone

(dialect, Tsugaru, Akita) pickle

(Kansai, Gunma, Ibaraki, Akita) school

(dialect, Tsugaru) water

which month (question)

the moon unseen due to the rain / the fifth month in the lunar calendar

a nice and auspicious month / the second month of the lunar calendar

the moon still in the sky at the hours around dawn or sunrise