If you refer to words with different meanings according to whether they receive the stress on the first or the second syllable, such as permit, perfume and content, for example, the general rule is that when the first syllable is stressed ( PERmit, PERfume, CONtent ) the word is a noun, and when the second syllable is stressed ( perMIT, perFUME, conTENT ) the word is a verb.
The accented syllable in "wanders" is the first syllable, "wan."
The accented syllable in the word "fierceness" is the first syllable, "fierce."
Captive is stressed on the first syllable.
The first syllable is accented.
Flawless is accented on the first syllable.
The first syllable is accented.
The stressed syllable in "necessary" is the first syllable "nec."
It is not entirely clear whether you are asking which syllable is stressed or what the first syllable is. The stressed syllable is the first syllable: sev.
"Unfold" is accented on the first syllable. The stress is on the "un" syllable.
Footprint is stressed on the first syllable.
The stressed syllable in the word "morning" is the first syllable, which is "mor."
The first syllable is "A".