No, "travel" is not an unstressed syllable; it is a two-syllable word with the stress on the first syllable: "TRAv-el." The first syllable is stressed, while the second syllable is unstressed. Thus, "travel" contains both stressed and unstressed syllables.
It has 4 syllabel in word conventional
vel
The word is pronounced TRAV-el, not tra-VEL. The unstressed syllable is the second one.
4
In the word "travel," the unstressed syllable is "trav." The syllable "vel" is the stressed part, while "trav" is pronounced more softly and quickly. This stress pattern is typical in many two-syllable words in English.
1 syllabel
Maine
/avel/
The first syllable
Eat has one syllabel in it
It is a unit of a language that is spoken, that is bigger than a phoneme
(2)-Ants-uhred.