申す

Etymology 1
→ * → →  →

Shift from, Late Old Japanese mausu.

Verb

 * 1)  to say
 * 2)  to be called
 * 3)  to ask, request, or give thanks
 * 4)  to make a wish
 * 5)   to serve, perform an action for a superior
 * 6)   to formally or otherwise ceremonially do [verb]
 * 1)   to serve, perform an action for a superior
 * 2)   to formally or otherwise ceremonially do [verb]

Etymology 2
→ * →

Thought to be a shift from mōsu above, historical mausu.

Verb

 * 1) to say
 * 2) to be called
 * 3) to ask, request, or give thanks
 * 4) to serve, perform an action for a superior
 * 5)   to formally or otherwise ceremonially do [verb]

Usage notes
Modern dictionaries use as reference to this verb.

Etymology 2
→ * →

Shift from mawosu above, attested in a few later poems of the .

Since later poems also attest the use of earlier mawosu, a free variation of both pronunciations appears likely.