Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
fūnambŭlus, i, m. [funis-ambulo], a rope-dancer, Ter. Hec. prol. 4; prol. alt. 26; Suet. Galb. 6.
Transf.: tu funambule pudicitiae et castitatis, Tert. de Pudic. 10.
Called also fūnĭambŭlus, Aug. in Psa. 39, 9.