This is the 410th most frequent Slovak word.
táto
"Táto" in Slovak means "this" (feminine form).
In this use, "táto" directly specifies the object "obálku" (envelope) being referred to, aligned in gender.
Môžeš mi podať túto obálku, prosím?
Can you hand me this envelope, please?
In this sentence, "táto" is a demonstrative pronoun used to specify the feminine noun "kniha" (book).
Táto kniha je veľmi zaujímavá.
This book is very interesting.
Here, "táto" refers to the subject "stolička" (chair), indicating its feminine gender and singular form.