空: the sky, empty air

conjecture about a presently occurring situation that the speaker has no direct knowledge about

The hiragana syllable む (mu). Its equivalent in katakana is ム (mu). It is the thirty-third syllable in the gojūon order; its position is ま行う段 (ma-gyō u-dan, “row ma, section u”).

Used to indicate a mumbling sound.

(Classical Japanese, after mizenkei) Used to form the volitional form of verbs, equivalent to modern う (-u > -ō) / よう (-yō).

否む: to dislike

empty; vain; sky

the sky

something empty / ineffectual / false

by heart, from memory, by rote