verb form VIII ābtsr Abtsr ابتسر Bookmark Bookmarked Share 1.See بَسَرَ.2. -A2- اُبْتُسِرَ لَوْنُهُ (tropical:) His colour changed, (K, TA,) and became like that of بُسْر [or full-grown unripe dates]. (TA.)