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twentieth
sustainable

twen·ti·eth

twentieth

 
pronunciation:
twen ti ihth
parts of speech:
adjective, noun
features:
Word Parts
part of speech: adjective
definition: coming next after the nineteenth in a series.
The twentieth anniversary of my parents' wedding was a happy event.
 
part of speech: noun
definition 1: one of twenty equal parts of a whole; 1/20.
One twentieth of their income goes to charity.
definition 2: the number, person, or thing that comes next after the nineteenth in a series.
The twentieth was the happiest year of their marriage.
Word Parts  About this feature
The word twentieth contains the following part:
-th1, -eth Old English adjective- and noun-forming suffix that means in the position in a series indicated by the base number;
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This suffix attaches to numbers to form ordinal numbers, such as "fourth " from "four." The spelling -eth is used when the base ends in y, as in "twentieth " from "twenty."