Infirmly

in·firm  (n-fûrm)

adj.

1. Weak in body, especially from old age or disease; feeble. See Synonyms at weak.

2. Lacking firmness of will, character, or purpose; irresolute.

3. Not strong or stable; shaky: an infirm support.

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[Middle English infirme, from Old French, from Latin nfirmus : in-, not; see in-¹ + firmus, strong, firm; see dher- in Indo-European roots.]

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in·firmly adv.