-tude (Latin: a suffix; state, quality, condition of).A suffix that forms nouns from adjectives and past participles.altitude: 
aptitude: 
fortitude: 
gratitude: 
ineptitude: 
ingratitude: 
lassitude: 
latitude: 
longitude: 
multitude: 
plenitude: 
senectitude: 
servitude: 
similitude: 
solitude: 
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