QUICK ANSWER
"Unending" is an adjective which is often translated as "interminable", and "endless" is an adjective which is also often translated as "interminable". Learn more about the difference between "unending" and "endless" below.
unending(
uhn
-
ehnd
-
ihng
)An adjective is a word that describes a noun (e.g. the big dog).
1. (general)
a. interminable
I'm still trying to get over this awful, unending cold.Sigo tratando de recuperarme de este horrendo resfriado interminable.
b. sin fin
When you're a kid, church seems unending, but now that I'm older, I get a lot more out of it.Cuando eres niño, la misa parece sin fin, pero ahora que soy mayor, le saco mucho más provecho.
endless(
ehnd
-
lihs
)An adjective is a word that describes a noun (e.g. the big dog).
1. (ceaseless)
b. infinito
The chef presented a seemingly endless variety of shrimp dishes.El chef presentó una variedad aparentemente infinita de platillos de camarón.
c. inagotable
Thorium reactors could provide endless clean energy.Los reactores de torio podrían proporcionar energía limpia inagotable.
d. eterno
Summer days in the far north are endless.Los días de verano en el extremo norte son eternos.
e. continuo
Peter had endless complaints about how the administration was operating.Las quejas de Peter sobre cómo funcionaba la administración eran continuas.
2. (countless)
3. (technology)
a. sin fin
The noise in the engine is coming from an endless belt that's slipping.El ruido del motor viene de una banda sin fin que se está resbalando.