Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
overcritical is an adjective meaning "inclined to judge too severely". It carries one recorded sense.
inclined to judge too severely
“hypercritical of colloquial speech”
“the overcritical teacher can discourage originality”
Definitions, synonyms and semantic relations for overcritical come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.