恒

Phono-semantic compound:

心 (“heart, mind”) – semantic, indicating inner steadiness or persistence.

亘 (“to extend, to span across”) – phonetic element.

Originally denoted something that extends steadily and without interruption, later developing the abstract sense of “constancy, permanence, regularity.”

Semantic range:

- constant, perpetual, always;

- enduring, lasting, persistent;

- to spread, to extend, to pervade;

- figurative: steadfast, reliable, consistent.

항상 (恒常) – always, constantly

항구 (恒久) – permanent, everlasting

항온 (恒溫) – constant temperature

항심 (恒心) – constancy, steady heart