stubborn; hardheaded
Rare expression meaning obstinate or unyielding. The reading じょうがこわい is unusual; 情 is normally read じょう in compounds, but the whole phrase is not common in modern Japanese.
「情が強い」 is an old expression describing someone stubborn who won't listen to others.
The phrase combines 情 (じょう, 'feelings, emotions') with 強い (こわい, 'strong, tough'). The exact historical derivation is uncertain; it may have originally described someone with strong, unyielding emotions, later shifting to mean stubborn.