酔う

Etymology 1
→ →  → * → * →

Shift from classical verb, possibly parsed as jefu, itself from.

Compare the development of.

Verb

 * 1) to get drunk, become intoxicated or inebriated, fall under the influence of alcohol
 * 2)  to become drunk or intoxicated exhilarated by something
 * 3) to get motion sickness
 * 4) to get addicted
 * 5)  to get poisoned
 * 6)  to get distracted by charm
 * 1) to get addicted
 * 2)  to get poisoned
 * 3)  to get distracted by charm
 * 1)  to get poisoned
 * 2)  to get distracted by charm
 * 1)  to get distracted by charm

Etymology 2
Regular development of wepu. In the colloquial language, wepu developed into you, so eu is now only used in reading ancient texts.