雄黄: realgar, an arsenic sulfide mineral / 雌黄: orpiment, an arsenic sulfide mineral

eau de toilette, toilet water (lightly scented perfume)

Sprachgefühl: a sense of language. / The nuance of a word; the feeling of a word; the feel of a word.

The hiragana syllable ぎゃ (gya). Its equivalent in katakana is ギャ (gya).