ثل

5 تثلّل تثلل ثل It (a house) became thrown down, or demolished; (K;) as also ↓ انثلّ: (TA:) or it (a house) became thrown down, or demolished, and it fell by degrees, part after part. (M.) And تَثَلَّلَتِ الرَّكِيَّةُ The well became demolished. (TA.)