How do you divide rethinking into syllables?

Rethinking divides as re-think-ing.

Which syllable is stressed in rethinking?

The second syllable (re-THINK-ing).

Syllables in rethinking

re·think·ing

Rethinking has three syllables. The stress falls on the second syllable.

Pronunciation	/ɹiˈθɪŋkɪŋ/ 3 syllables, re-THINK-ing · da-DUM-da
Stress	Second syllable
Letters	10

To count it yourself, say rethinking slowly and listen for each vowel sound: re, think, ing. Each beat is one syllable.

How many syllables are in rethinking?: Rethinking has three syllables.
How do you divide rethinking into syllables?: Rethinking divides as re-think-ing.
Which syllable is stressed in rethinking?: The second syllable (re-THINK-ing).