arrogant

相互: mutual, reciprocal

That was unexpected. I didn't see that coming.

双角錐: dipyramid, bipyramid

双円錐: bicone, dicone

作曲者: composer

作詞者: lyricist

記者: reporter, journalist / 汽車: steam locomotive / 喜捨: alms / 貴社: your company -(respectively) / 帰社: returning to one's company

calling someone by their family or given name only, without honorific suffixes such as さん (san)

本社: headquarters (of business firm)