alluvial terraced land
掵 refers to alluvial terraced land, a specific geographical feature formed by river deposits. It is a rare kanji with a narrow, technical meaning.
掵 combines 扌 (hand) with 命 (life, fate), but the exact historical development is uncertain. It may be a kokuji (Japanese-made kanji) created to represent a local geographical term.
The hand radical 扌 beside 命 (life) suggests shaping the land by hand to create terraces that support life. Picture hands carving stepped fields along a riverbank.
For ハバ, imagine a wide (幅, はば) alluvial terrace spreading out beside the river: はば -> ハバ, and the hand-shaped land stretches wide.
—