The word "bothering" is syllabicated as "both-er-ing." It consists of three syllables: "both," "er," and "ing." Each syllable is pronounced separately, with emphasis typically on the first syllable.
When there is a double consonant in a word, you typically syllabicate it between the double consonants. For example, in the word "butter," you would syllabicate it as "but-ter."
ren.dez.vous
but ter
The word "item" is syllabicated as i-tem.
am-nes-ty
Fin-e
Grum-ble
preach-ed.
an-i-mal
Un-sure.
Mis-spell.
The word, history, is syllabicated HIS-TOR-Y