What is the Latin word for endless?

The usual Latin words for “endless” are īnfīnītus, sempiternus, inexplicābilis. The right choice depends on the sense; see the distinctions below.

English → Latin

“endless” in Latin

īnfīnītusboundless, unlimited, endless; infinite sempiternuseverlasting, perpetual, eternal, continual inexplicābilisinexplicable

Riddle & Arnold A Copious and Critical English–Latin Lexicon, 1864

endless

infinitus: nullis finibus circumscriptus: sempiternus (of perpetual duration). An endless war, bellum aeternum (Cic.); inexplicabile (Tac.): to be harassed by endless wars, sempiternis armis urgeri. It would be endless, infinitum est, etc.

Quick answer

What is the Latin word for endless?: The usual Latin words for “endless” are īnfīnītus, sempiternus, inexplicābilis. The right choice depends on the sense; see the distinctions below.

Entry from J. E. Riddle & T. K. Arnold, A Copious and Critical English–Latin Lexicon (rev. C. Anthon, New York: Harper, 1864), digitised by Fergus J. P. Walsh, CC BY-SA 4.0; Latin markup adapted by latindictionary.co.