Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
vĭgesco, gŭi, 3, v. inch. n. [vigeo], to become lively or vigorous; to thrive, to begin to flourish or bloom (class.): de niloque renata vigescere copia rerum, Lucr. 1, 674; 1, 757: jam laeti studio pedes vigescunt, Cat. 46, 8: vestrae tum arae, vestrae religiones viguerunt, vestra vis valuit, Cic. Mil. 31, 85: diu legiones Caesaris viguerunt, nunc vigent Pansae, vigent Hirtii, etc., id. Phil. 11, 15, 39: summis honoribus et multā eloquentiā, Tac. A. 14, 19.