Here are the possible solutions for they have limits clue
Answer
Clue
Relevancy
cities
Clue
They have their limits
Definition
CITY, a large town
finites
Clue
They have their limits
Sets that have limits
Definition
FINITE, a verb limited by person, number, tense or mood
speeds
Clue
They have limits
newt
Clue
Gingrich who said "females have biological problems staying in a ditch for thirty days because they get infections and they don't have upper body strength"
Definition
a tailed amphibian of the salamander family, also EWT