ทูล

From Old Khmer *dūl, *dul, dval, dvall, dvāl (“to address (clergy or royalty); to carry or wear on the head; head; top; eminence, majesty; head-shaped formation, as dome, hill, hillock, bulge, swelling, etc”), corresponding to Modern Khmer ទួល (tuəl), ទូល (tuul).

Extended as pandūl, pandul, paṃdul, pandval, from which Thai บัณฑูร (ban-tuun) was derived.

Compare Old Mon tūl, tul (“above; on”); Middle Mon duiw (“hill; hilltop”); Burmese တောင် (taung, “hill; mountain”).

ทูล • (tuun) (abstract noun การทูล)

1. (royal) to address, inform, tell, or speak to (a god, high priest, or royal person).
2. (archaic) to carry (with or on the head).

• As for the second sense, the term is now replaced by ทูน (tuun) but it still appears in a number of compounds, as ทูลกระหม่อม (tuun-grà-mɔ̀m), ทูลเกล้าทูลกระหม่อม, ทูลละอองธุลีพระบาท, ทูลละอองธุลีพระบาท, etc.