-tude
a suffix appearing in abstract nouns (generally formed from Latin adjectives or participles) of Latin origin (latitude; altitude); on this model, used in the formation of new nouns: platitude.
Origin of -tude
< Latin -tūdō (> French -tude)
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Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
British Dictionary definitions for -tude
-tude
suffix forming nouns
indicating state or conditionplenitude
Word Origin for -tude
from Latin -tūdō
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
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Word Origin and History for -tude
-tude
syllable formed when the word-forming element -ude, forming abstract nouns from adjectives and participles, is fixed to a base or to another suffix ending in -t or -te; from French -ude, from Latin -udo (genitive -udinis). As a word in its own right, teenager slang shortening of attitude, it dates from 1970s.
Online Etymology Dictionary, © 2010 Douglas Harper