tighten

verbs

make tight or tighter
"Tighten the wire"
fasten, tighten
is derived from
tightening
become tight or tighter
"The rope tightened"
tighten
is a type of (narrower)
undergo a change; become different in essence; losing one's or its original nature
"She changed completely as she grew older"; "The weather changed last night"
change
restrict
"Tighten the rules"; "stiffen the regulations"
constrain, stiffen, tighten, tighten up
narrow or limit
"reduce the influx of foreigners"
reduce, tighten