夕日: the setting sun, sunset / 雄飛: launching into, embarking / 夕陽: setting sun

平上去入: The four tones in old Chinese phonetics.

来る日: the coming days

Classical Japanese form of ひさぐ (hisagu, “to sell”, godan verb)

容積比: volume ratio

拍子木: (music) a Japanese percussion instrument made of two pieces of hardwood or bamboo that are tied together with a rope and struck together

被災者: victim of a disaster

(onomatopoeia) the sound of the wind

皮膚炎: (pathology) dermatitis

The hiragana syllable ひゃ (hya). Its equivalent in katakana is ヒャ (hya).