and ↓تستّر (S, M, K) and ↓انستر (IAar, M) It became veiled, concealed, or hidden; or it veiled, concealed, or hid, itself: (M:) it became covered; or it covered itself. (S, K.)
2.
[Hence,] فُلَانٌ لَا يَسْتَتِرُ مِنَ اللّٰهِ بِسِتْرٍ (tropical:) [Such a one does not protect himself from the displeasure of God by piety; i. e.,] such a one does not fear God. (A, TA.)