noun

A long rod or rigid piece of wood, metal, or similar material, typically used as an obstruction, fastening, or weapon.

an iron bar

rod,pole,stake,stick,batten,shaft,shank,rail,pale,paling,spar,strut,support,prop,spoke,crosspiece,girder,beam,boom

transitive verb

Fasten (something, especially a door or window) with a bar or bars.

she bolts and bars the door

bolt,lock,fasten,padlock,secure,latch,block,barricade,obstruct

preposition

Except for; apart from.

everyone, bar a few ascetics, thinks it desirable

except,except for,apart from,but,but for,other than,besides,aside from,with the exception of,short of,barring,excepting,excluding,omitting,leaving out,save,save for,saving