快かい

noun

pleasure; delight; enjoyment

Refers to a feeling of comfort, satisfaction, or pleasantness. Often used in compounds like 快感 (pleasant sensation) or 快適 (comfortable).

• 温おん泉せんに入はいると、心しん身しんともに快かいを感かんじる。

  When I soak in a hot spring, I feel pleasure both physically and mentally.

noun

rapid train (abbreviation)

Abbreviation of 快速 (rapid train). Used in train service names like 快特 (rapid limited express). Not used as a standalone word for 'rapid'.

See also: 快速 · 快特

• 「快かい特とく」の「快かい」は快かい速そくの略りゃくです。

  The 快 in 快特 is an abbreviation of 快速 (rapid).