白い

Etymology
Modern form of adjective.

(classical or terminal form) →  (classical  or attributive form) →  (modern shūshikei and rentaikei)

An intervocalic sound-change caused the medial plosive to undergo voicing, then spirantization, then gliding, then being dropped, before  (Hamano, 2000).

→ * → * → * → * →  →.

Adjective

 * 1) white