一打: a (single) stroke, blow / 一朶: a (single) branch of flowers; a (single) cloud / 一駄: an amount equivalent to the carrying capability of one horse

to be confused due to residual drowsiness

開祖: founder

便座: a toilet seat / 弁座, 瓣座: a valve seat

(dialectal) to lie on one's stomach

花相撲: an exhibition sumo tournament, hanazumo

(childish) foot / (childish) toddle; walk

(childish) to toddle; to walk

The katakana syllable ヴュ (vyu). Its equivalent in hiragana is ゔゅ (vyu).

(Tōhoku) it is so