بطل

2 التَّبْطِيلُ التبطيل [inf. n. of بطّل] signifies ↓ فِعْلُ البطالهِ, [in which the latter word is written in the TA without any indication of the vowel of the ب,] i. e. The pursuit of vain, or frivolous, diversion or sport, and foolish, or ignorant, conduct. (TA.) [See بِطَالَةٌ, above, and the phrase next following it.] -A2- See also 4.