(idiomatic) Basically good, but with some shortcoming or limitation.

(quantum mechanics) a potential well that confines particles in one dimension, forcing them to occupy a planar region

(physics) the region surrounding a local minimum of potential energy, especially if the potential has a constant value in an interval and a higher (finite or infinite) value outside of it

(idiomatic) An expression of mild disappointment or resignation; too bad, it's a pity.

Noble; born into the upper classes.

Good in manner, habit, form, or construction; well-mannered; well-done. / Having an attractive physical appearance or strong muscles.

Almost, nearly.

A well whose water is supplied by a hot spring.

Eloquent and able with regards to speech.

Of a book, etc.: showing signs of frequent or heavy use; worn; well used.