lengthy

[ lengk-thee, leng-, len- ]

/ ˈlɛŋk θi, ˈlɛŋ-, ˈlɛn- /

having or being of great length; very long: a lengthy journey.

tediously verbose; very long; too long: a lengthy speech.

Origin of lengthy

An Americanism dating back to 1680–90; length + -y¹

length·i·ly, adverb length·i·ness, noun

If it had been on the rotation of my crops, I would have answered myself, lengthily perhaps, but certainly con gusto.

Memoir, Correspondence, And Miscellanies, From The Papers Of Thomas Jefferson |Thomas Jefferson
Never before in his life had Mark spoken so eloquently nor so lengthily.

Janet of the Dunes |Harriet T. Comstock
He lengthily accused Grousset of having stolen paper in order to print his journal; another of having lived with a mistress.

History of the Commune of 1871 |P. Lissagary
In any case, it is the one which has been the most perseveringly, lengthily and carefully studied by highly competent men.

Mrs. Piper & the Society for Psychical Research |Michael Sage

A Conservative speech is as accurately (though perhaps not as lengthily) reported in a Liberal paper as in one of its own colour.

The Land of Contrasts |James Fullarton Muirhead

lengthy

/ (ˈlɛŋkθɪ, ˈlɛŋθɪ) /

of relatively great or tiresome extent or duration

lengthily, adverb lengthiness, noun