貝合わせ: tribadism

to try, attempt / to taste, sample

kai-awase (a Heian period game involving matching two pieces of a clamshell) / (slang) tribadism

(formal) Female third-person singular pronoun; she, her, girlfriend

(colloquial) a girlfriend (a female partner in a romantic relationship)

(literary) they (about women or girls)

藍色: The color indigo. / 合色: (rare) A sign or indication that two sides in a conflict are coming together to do battle.

Iceland

谷間: (geology) valley, ravine / 谷間: a low space between tall objects, such as buildings / 谷間: cleavage between breasts

し合う: to do together