Captive is stressed on the first syllable.
The first syllable is accented.
Flawless is accented on the first syllable.
Footprint is stressed on the first syllable.
Water is stressed on the first syllable. A simple way of testing which syllable is stressed is by saying the word aloud. Look for the syllable that you naturally emphasise more in your speech.
Service is accented on the first syllable.
The first.
The stressed syllable in "service" is the first syllable "ser."
yes
Yes.
Captive is stressed on the first syllable.
The first syllable is accented.
The accented syllable in the word "fierceness" is the first syllable, "fierce."
Flawless is accented on the first syllable.
The first syllable is accented.
The accented syllable in "wanders" is the first syllable, "wan."
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.