reveille; wake-up bugle
Military or camp bugle call signaling time to wake up.
The wake-up bugle sounded at 6 a.m.
Standard modern spelling using katakana for ラッパ.
Rarely used kanji form; 喇叭 is an older kanji spelling for ラッパ.
Compound of 起床 (kishō, 'getting up') and ラッパ (rappa, 'bugle, trumpet').