betterment

n [U] (fml 文) making or becoming better; improvement 改好; 改良; 改善; 改进.

bestow, bestowal, bestride, bet, bet on, beta, bete noire, betel, betel-nut, betide, betoken, betray, betrayal, betrayer, betroth, betrothal, betrothed, better, better off, better-off, betting-shop, bettor, between, between (also in between), betwixt, bevel, bevel gear, beverage, bevy, bewail, beware, bewilder, bewildering, bewilderment, bewitch, bewitching, bewitchingly, beyond, beyond control, beyond dispute,