Tripinatifid or Tripinnatifid: How To spell?
The word Tripinatifid is misspelled against Tripinnatifid, an adjective meaning "Thrice pinnately cleft; -- said of a pinnatifid leaf when its segments are pinnatifid, and the subdivisions of these also are pinnatifid."
Tripinnatifid has double "nn" is mispronounced as "n"Remember double 'NN' in between the strings tripi & atifid which should not be misspelled with single 'N'
Wrong Spelling:  tripi-n-atifid  Correct Spelling:  tripi-nn-atifid 
Find more wrongly spelled words of Tripinnatifid to spell it well.