foot-and-mouth disease (Aphtae epizooticae, FMD)

春日: a female given name

The hiragana syllable ひょ (hyo). Its equivalent in katakana is ヒョ (hyo).

voiceless cicada, i.e. a female cicada

this / right, correct, just / indicates agreement or affirmation

right, justice

epidemic

(organic chemistry) octane

summary, synopsis (of a story or film)

lay waste; devastate; put everything in disorder / invade; barge into someone's area or domain / destroy; ruin / (Internet) troll; vandalize