ummāra

  1. a threshold Vin.iv.160 (= indakhīla); Thig.410; Ja.i.62; Ja.iii.101; Vism.425; Dhp-a.i.350.
  2. a curb-stone Ja.vi.11.
  3. as uttar˚; (the upper threshold) the lintel Ja.i.111; Dhp-a.ii.5 (variant reading upari˚).
  4. window-sash or sill Ja.i.347; Ja.iv.356.

according to Müller P. Gr. = Sk. udumbara (?)