(tropical:) A great calamity or misfortune or disaster. (IDrd, K, TA.)
2.
(assumed tropical:) Difficulties, distresses, or afflictions. (IDrd, K.) You say, هُوَ نَهَّاضٌبِبَزْلَاءِ (assumed tropical:) He is one who manages great affairs; (S, K, TA;) who has ability and strength to overcome difficulties. (TA.)
3.
(assumed tropical:) Good judgment or opinion or counsel. (S, K.)
4.
مَا لِفُلَانٍ بَزْلَاءُيَعِيشُ بِهَا (assumed tropical:) Such a one has not determination, resolution, or decision, of judgment, whereby to live. (TA.)
5.
هُوَ ذُو بَزْلَاءَ (assumed tropical:) He has a firm, or well-established, way, or manner, of acting, or conducting himself. (TA.)
6.
خُطَّةٌ بَزْلَاءُ (tropical:) A great event that distinguishes that which is true and that which is false. (K, * TA.)