Dinner can be divided in two ways:
Dinner has 2 syllables.
Nest is only one syllable.
No, you do not divide a one-syllable word. The word is pronounced with a single stress point.
The word plant has one syllable. This means that there is no syllable divide for this word.
Grim-ace, divided as "grim" (1 syllable) and "ace" (1 syllable).
tooth
jour-ney
of-ten
Rob-in
a-bol-ish
rea-son
east-ern