Anagrams of: ABIRSS

• a relation that provides the foundation for something

• the fundamental assumptions from which something is begun or developed or calculated or explained

• the most important or necessary part of something

• an alloy of copper and zinc

• a wind instrument that consists of a brass tube (usually of variable length) that is blown by means of a cup-shaped or funnel-shaped mouthpiece

• the persons (or committees or departments etc.) who make up a body for the purpose of administering something

• impudent aggressiveness

• an ornament or utensil made of brass

• the section of a band or orchestra that plays brass instruments

• a memorial made of brass

• the Jewish rite of circumcision performed on a male child on the eighth day of his life

• an adult male singer with the lowest voice

• the lowest adult male singing voice

• gymnastic apparatus consisting of two parallel wooden rods supported on uprights

• the lowest part of the musical range

• the lean flesh of a saltwater fish of the family Serranidae

• the lowest part in polyphonic music

• any of various North American freshwater fish with lean flesh (especially of the genus Micropterus)

• nontechnical name for any of numerous edible marine and freshwater spiny-finned fishes

• an adult male singer with the lowest voice

• the lowest adult male singing voice

• the member with the lowest range of a family of musical instruments

• having or denoting a low vocal or instrumental range