The word mukha has acute accent (udātta) on the final when preceded by abhi,
As, अभिमुख꣡म् ॥ It is a Bahuvrihi or a प्रादि samasa. If it is an Avyayibhava, then it would have acute on the final by 6.1.223 also. By 6.2.177, even मुख would have oxytone after an upasarga, the present sutra makes the additional declaration that मुख is oxytone even when the compound is not a Bahuvrihi, when it does not denote an indispensable part of body, or a part of body even, as was the case in 6.2.177. Thus अभिमुखा꣡ शाला ॥,