كشر1 كَشَرَ عَنْ أَسْنَانِهِ, (M, A, K,) aor. ـِ inf. n. كَشْرٌ; (M, K;) [and ↓ تكشّر, alone; (occurring in the S, K, voce كَلَحَ;)] He displayed his teeth, or grinned, (M, A, K,) in laughter, and otherwise. (M, K.) You say also كَشَرَ عَنْ نَابِهِ He (a camel) displayed his tusk: (S:) and he (a beast of prey) snarled by reason of irritation. (TA.) And كَشَرَ عَنْ أَنْيَابِهِ He (an enemy, and a beast of prey,) displayed his dog-teeth, or tusks. (A.) And إِكْشِرْ عَنْ أَنْيَابِكَ (tropical:) Threaten thou. (A.) b2: Also كَشَرَ, inf. n. as above, He smiled, or laughed a little without any sound, so as to display his teeth: (ISk, S, K: *) or he displayed his teeth in smiling. (TA.) And كَشَرَ إِلَيْهِ He smiled to him, displaying his teeth. (A.) b3: and كَشَرَ فُلَانٌ لِفُلَانٍ (tropical:) Such a one behaved ferociously to such a one, or became changed towards him, and threatened him. (TA.)3 كاشرهُ, (A, K,) inf. n. مُكَاشَرَةٌ, (A,) He displayed his teeth to him, or grinned to him: (K:) or he laughed in his face; and conversed, or acted with him without shyness or aversion, boldly, or in a free and easy, or cheerful, manner (وَبَاسَطَهُ). (TA.)5 تَكَشَّرَ see 1.كِشْرَةٌ [The act of displaying the teeth, or grinning, to another: or laughing in the face of another, and looking at him in an open or a cheerful manner:] a subst. from كَاشَرَ, (K, TA,) like هِجْرَةٌ from هَاجَرَ, and عِشْرَةٌ from عَاشَرَ. (Az, TA.)