There are 2 definitions of -ty in English:

-ty1

Syllabification: -ty

suffix

Forming nouns denoting quality or condition such as beauty, royalty.

Origin

via Old French from Latin -tas, -tat-.

Definition of -ty in:

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Word of the day ween
Pronunciation: wiːn
verb
be of the opinion; think or suppose

There are 2 definitions of -ty in English:

-ty2

Syllabification: -ty

suffix

Denoting specified groups of ten: forty ninety

Origin

Old English -tig.

Definition of -ty in:

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Word of the day ween
Pronunciation: wiːn
verb
be of the opinion; think or suppose