from
The Collaborative International Dictionary of English v.0.48
Descant \Des*cant"\ (d[e^]s*k[a^]nt"), v. i. [imp. & p. p.
{Descanted}; p. pr. & vb. n. {Descanting}.] [From descant;
n.; or directly fr. OF. descanter, deschanter; L. dis- +
cantare to sing.]
1. To sing a variation or accomplishment.
[1913 Webster]
2. To comment freely; to discourse with fullness and
particularity; to discourse at large.
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A virtuous man should be pleased to find people
descanting on his actions. --Addison.
[1913 Webster]