Transitive verb

astringency; constriction; contraction

Transitive verb

collecting (e.g. opinions); putting together; summarizing

collection (of taxes)

convergence (of light)

Mathematics

convergence

Biology

convergence

Biology

convergent evolution

(levying of a) heavy taxation

exaction of heavy taxes; imposing oppressive taxes

interment; burial

oppressive exaction (of taxes, etc.)

Pharmacology

astringent