mulberry
檿 refers specifically to a type of mulberry tree, likely a wild or mountain mulberry.
檿 combines 木 (tree) with 厭, which likely provides the sound. The character is used for a specific mulberry tree.
The tree 木 is pressed under 厭, like a mulberry tree growing in a sheltered mountain spot.
For エン, imagine an English mulberry tree: the 'en' in English cues エン.