Similar words
endlos
unendlich is more mathematical or absolute, "infinite"; endlos is more everyday, like an endless wait or line.
Similar in other languages
English
countless
Close — infinite relates to countless.
Spanish
inagotable
Close — infinite, endless relates to inexhaustible (inagotable).
French
illimité
Close — infinite, endless relates to unlimited (illimité).
Practice
1 What does unendlich mean?
infinite, endless
2 Fill the gap: Das Universum ist ___ groß.
Full sentence: Das Universum ist unendlich groß. (The universe is infinitely large.)
3 Which fingerprint chart matches unendlich?
unendlich: neutral register, common frequency, general domain, neutral connotation.