re·tight·en | \ (ˌ)rē-ˈtī-tᵊn 
\
\retightened; retightening
Definition of retighten
: to make (something) tight or tighter again
Retighten the screws. He retightened his belt/grip.
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Time Traveler for retighten
The first known use of retighten was in 1749
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