, aorist
كَلَحَ, verbal noun كُلُوحٌ and كُلَاحٌ; (S, K;) and ↓تلكّح, and ↓اكلح, (K,) and ↓اكلوّح; (A;) He (a man, S) grinned, or displayed his teeth, (M, rendered in the S and K by تَكَشَّرَ), frowning, or contracting his face, or looking sternly, austerely, or morosely. (S, M, K.)
2.
كَلَحَ فِى وَجْهِهِHe frightened him; namely a child, and a madman. (A.)