Useful english dictionary. 2012.
Sighingly — Sighing Sigh ing, a. Uttering sighs; grieving; lamenting. Sighing millions. Cowper. {Sigh ing*ly}, adv. [1913 Webster] … The Collaborative International Dictionary of English
sighingly — adverb In a sighing way; with sighs … Wiktionary
sighingly — sigh·ing·ly … English syllables