Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
astonied is an adjective meaning "filled with the emotional impact of overwhelming surprise or shock". It carries one recorded sense.
filled with the emotional impact of overwhelming surprise or shock
“an amazed audience gave the magician a standing ovation”
“I stood enthralled, astonished by the vastness and majesty of the cathedral”
“astounded viewers wept at the pictures from the Oklahoma City bombing”
“stood in stunned silence”
“stunned scientists found not one but at least three viruses”
Definitions, synonyms and semantic relations for astonied come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.