كَشَرَ عَنْ أَسْنَانِهِ, (M, A, Ḳ,) aor. ـِ {يَكْشِرُ}, inf. n. كَشْرٌ; (M, Ḳ;) [andتكشّر↓, alone; (occurring in the Ṣ, Ḳ, voce كَلَحَ;)] He displayed his teeth, or grinned, (M, A, Ḳ,) in laughter, and otherwise. (M, Ḳ.) You say also كَشَرَ عَنْ نَابِهِ He (a camel) displayed his tusk: (Ṣ:) 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 ‡ Threaten thou. (A.)

Also كَشَرَ, inf. n. as above, He smiled, or laughed a little without any sound, so as to display his teeth: (ISk, Ṣ, Ḳ:*) or he displayed his teeth in smiling. (TA.) And كَشَرَ إِلَيْهِ He smiled to him, displaying his teeth. (A.)

And كَشَرَ فُلَانٌ لِفُلَانٍ ‡ Such a one behaved ferociously to such a one, or became changed towards him, and threatened him. (TA.)

كاشرهُ, (A, Ḳ,) inf. n. مُكَاشَرَةٌ, (A,) He displayed his teeth to him, or grinned to him: (Ḳ:) 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.)

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, (Ḳ, TA,) like هِجْرَةٌ from هَاجَرَ, and عِشْرَةٌ from عَاشَرَ. (Az, TA.)