תַּרְבּוּת f. (b. h.; רָבָה) 1) growth, education, rearing. B. Kam. 16ᵇ בני ת׳ tamed animals. Ib. ארי ת׳ a tamed lion.—Esp. ת׳ רעה bad manners, depravity; degenerate child. Nidd. X, 8 הרי זו ת׳ ר׳ this is mischievous conduct. Ḥag. 15ᵃ לאחר שיצא לת׳ ר׳ after he (Elisha ben Abuya) had become an infidel. Ex. R. s. 1, beg (ref. to Gen. XXI, 11) על שיצא לת׳ ר׳ (Abraham was displeased because of his son) because of his depravity. Ib. כל המונע … סוף בא ת׳ ר׳ when a man refrains from chastising his son, the latter will in the end turn to mischief. Ib. ללמוד ממנו ת׳ ר׳ to learn bad manner from him. Ib. קשה ת׳ ר׳ בתוך ביתו וכ׳ a degenerate child in a man’s house is worse than the war of Gog and Magog. Gen. R. s. 28 למלך … והוציאו לת׳ ר׳ a king that gave his son in charge of a pedagogue, and he led him to a bad life; a. fr. —2) fructification. Y. Ab. Zar. II, 41ᵇ, v. תּוֹרִיב.