beg, appeal for help
龥 centers on making a request from a position of need: begging or appealing for help.
龥 combines 龠 (a reed instrument) with 頁 (head). The exact historical development is uncertain, but it likely relates to calling out or appealing, possibly with a musical or vocal connotation.
Picture a person holding a reed instrument (龠) and bowing their head (頁) while begging or appealing for help. The instrument and lowered head together suggest a plea.
For ヤク, imagine a beggar appealing for a yak (ヤク) to help carry their load. The yak's name cues the reading ヤク, and the scene ties to begging for assistance.