The correct reading しっこうゆうよ uses standard On'yomi. 執 (シツ) + 行 (コウ) results in the common euphonic change to しっこう. This legal term refers to a court decision where a prison sentence is imposed but its enforcement is temporarily suspended, often conditional on good behavior during a probationary period.

正しい読みは「しっこうゆうよ」で、全て音読みです。「執」と「行」は促音化して「しっこう」となります。裁判所が刑罰を言い渡すものの、その刑の執行を一定期間猶予し、その間を無事に過ごせば刑の言い渡しが効力を失う制度を指します。