No, endlessly is an adverb. The adjective form is endless.
The professor just seems to drone on and on, endlessly.
A flat extending endlessly in all directions is called a plane.
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It is called as a plain.
A line.
It is an adjective (without end, or tediously long). The adverb form is endlessly.
No, endless is an adjective, a word that describes a noun. The adverb form is endlessly.
the professor droned on endlessly
Endlessly is an adverb.
We Play Endlessly was created in 2009.
The professor just seems to drone on and on, endlessly.
Endlessly - album - was created on 2010-11-26.
Out of the Cradle Endlessly Rocking was created in 1859.
Endlessly - Brook Benton song - was created in 1970-09.
A flat extending endlessly in all directions is called a plane.
endlessly, constantly.
sans fin