سبكرQ. 4 اِسْبَكَرَّ i. q. اِسْبَطَرَّ in its several significations: (K:) i. e. (TA) b2:  He stretched himself: (TA:) he lay upon his side, and stretched himself: (AA, S, TA:) [&c.] b3:  He (a youth, or young man,) became tall: (Lh:) and اسبكرّت She (a girl) became of erect and justly-proportioned stature. (S, K.) An ex. occurs in a verse of Imra-el-Keys, cited voce مِجْوَلٌ. (S.) b4: It (a plant) became tall and full-grown: (TA:) and it (anything) became extended, and long, or tall. (Lh.) b5:  He went at random, or heedlessly; without consideration, or certain aim. (Lh.) b6: It (a river) flowed. (TA.) b7:  اسبكرّت عَيْنُهُ His  eye shed tears. (Lh.) But ISd says that this is not known in classical Arabic. (TA.) مُسْبَكِرٌّ [act. part. n. of the verb above]. b2:  A youth, or young man, of just proportion, and full grown. (Aboo-Ziyád El-Kilábee, S, K.) b3: Hair that hangs down; lank; not crisp: (S, K:) or of just length: or full-grown, and standing out. (TA.) b4:  And Anything extended, and long, or tall. (Lh.)