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Webster 1913 Edition

Noun.

Staidness.

[Archaic]

W. Whately.

Solidity; weight.

[R.]

Camden.

Noun.

Moderation; gravity; sobriety; prudence. [See Staidness.]

Solidity; weight. [Little used.]

stayedness ‎(uncountable)

(archaic) staidness
(Can we find and add a quotation of W. Whately to this entry?)
(archaic) solidity; weight
- Camden
  When substantialness combineth with delightfulness, and currentness with stayedness, how can the language sound other than most full of sweetness?