birn / burn [bɜrn]
birn – n. – 1. the pear-shaped socket of a wind instrument, such as a clarinet, which holds the mouthpiece; 2. charred heather stems or branches that remain after a moor burning
burn – v. – 1. be or cause to be destroyed/injured by fire, heat or radiation; 2. intr. – blaze or glow with fire; resemble fire; 3. intr. – be filled with anger, envy or lust; n. – 1. a mark or injury caused by burning, friction or abrasion; 2. the ignition of a rocket engine in flight giving extra thrust; 3. an area of terrain destroyed by fire