Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
high-power is an adjective meaning "vigorously energetic or forceful". It carries one recorded sense.
vigorously energetic or forceful
“a high-octane sales manager”
“a high-octane marketing plan”
“high-powered executives”
“a high-voltage theatrical entrepreneur”
Definitions, synonyms and semantic relations for high-power come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.