clank (v.) Look up clank at
1610s, perhaps echoic, perhaps a blend of clang (v.) and clink (v.), perhaps from a Low German source (compare Middle Dutch clank, Dutch klank, Old High German klanc, Middle Low German klank, German Klang).
clank (n.) Look up clank at
1650s, from clank (v.). Reduplicated form clankety-clank attested from 1895.