the tenth of the twelve Terrestrial Branches (ancient form)
丣 is an ancient form representing the tenth of the twelve Terrestrial Branches, a traditional Chinese zodiac and calendrical sign. Its standalone meaning is limited to this specific historical usage.
丣 is an ancient variant form of 酉, the tenth Earthly Branch. The exact historical development of this particular shape is uncertain, but it is related to the pictograph of a wine vessel.
The shape resembles a container or vessel, which can be linked to the traditional association of the tenth Branch with the rooster or wine. Picture an ancient jar marked with the sign of the tenth Branch.
For ユウ, imagine a unique ancient jar labeled 'you' (ユウ) to remind you of its special calendrical meaning.