線形性: linearity

曳船: tugboat

兵制: a military system / 兵勢: military force, military strength / 幣制: a monetary or currency system / 平正: fair and correct / 平生: completely usual, ordinary / 平静: serenity, tranquility, peace

平成: the Japanese era under Emperor Akihito (1989–2019)

緯線: parallel (line of latitude)

指定席: reserved seat

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