Left side
方 supplies the sound: fāng → fàng with only a tone shift.
方's own pictographic origin (a plough or banner) is faintly relevant — the original
放 sense was 'to drive out, to send away in a direction,' so the directional meaning of
方 supports 'release, set loose, place outward.' Same phonetic in
房,
访,
仿,
防.