geminate Phonetics
■ adjective 'dʒɛmɪneɪt , -nət consisting of identical adjacent speech sounds; doubled.
■ verb 'dʒɛmɪneɪt double or repeat (a speech sound).
Derivatives
gemination noun
Origin
ME (in sense 'duplicate, doubled'): from L. geminat- , geminare 'double, pair with', from geminus 'twin'.