In modern Japanese, this kanji has little concrete meaning on its own, as it primarily functions as a grammatical particle or connective word. Historically, scholars propose three prominent theories regarding its pictographic origins:
An unstrung bowstring: It depicts a bow with its string unfastened and hanging loosely down, symbolizing something lingering, extended, or flowing naturally.
An umbilical cord: It portrays an umbilical cord connected to a newborn or mother, originally signifying ‘becoming pregnant’ or the nurturing of new life.
Slowly exhaled breath: It represents breath or vital energy lingering as it is released from the body, signifying smooth continuity or transition.“
Because of its graceful brush strokes and gentle phonetic rhythm, it is widely used in both boys’ and girls’ given names.