A bird, the American bittern.

(transitive) To set free, release or discharge (from obligations, debts, responsibility etc.). / (transitive, obsolete) To resolve; to explain; to solve.

(simile, informal) To be very leaky.

(historical) A Slavic language used from the 10th to the 14th centuries by East Slavs in the state of Kievan Rus and its successors. The ancestor of Belarusian, Russian, Rusyn and Ukrainian.