Similar words
ennuyeux
Close in casual speech — "this is so slow" is often used to mean "boring," just like ennuyeux and lent overlap.
Similar in other languages
Portuguese
lento
lento is the Portuguese word for the same thing — both mean "slow."
Practice
1 What does lent mean?
slow
2 Fill the gap: L'ordinateur est trop ___.
Full sentence: L'ordinateur est trop lent. (The computer is too slow.)
3 Which fingerprint chart matches lent?
lent: neutral register, core frequency, general domain, neutral connotation.