But why expatiate to a stranger on sorrow which must be secret?

It is needless to expatiate on its poetic merit or felicity of diction.

But I and my chimney must explain; and as we are both rather obese, we may have to expatiate.

It is useless to expatiate on a code of morals that seems to us positively Japanese.

It cannot be necessary to expatiate at all upon the nature of the offence.

This, however, is a subject on which it is not our intention to expatiate here.

He then proceeded to expatiate on every sort of rustic enormity of which he accused Benjie.

What necessity was there to expatiate on her brother's drunkenness?

We cannot expatiate upon the scene; we can only muse and worship.

You should hear Charles expatiate on your cleverness as a business woman.