Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
energising is an adjective meaning "supplying motive force". It carries one recorded sense.
supplying motive force
“the complex civilization of which Rome was the kinetic center”
Definitions, synonyms and semantic relations for energising come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.