slat

nouns

a thin strip (wood or metal)
slat, spline

verbs

equip or bar with slats
"Slat the windows"
slat
is a type of (narrower)
give something useful or necessary to
"We provided the room with an electrical heater"
furnish, provide, render, supply
close the slats of (windows)
slat
is a type of (narrower)
move so that an opening or passage is obstructed; make shut
"Close the door"; "shut the window"
close, shut