Fetching details from the dictionary...
look (esp. an angry or upset look); expression
「形相」 has another reading with different meanings.
form; appearance
彼かれの形相ぎょうそうは怒りいかりで満ちみちていた。
His expression was filled with anger.
彼女かのじょの形相ぎょうそうは穏やかおだやかになった。
Her expression became calm.
驚きおどろきの形相ぎょうそうを浮かべうかべた。
He had a look of surprise.