ระดับ

• รดับ (rá-dàp) — archaic, obsolete or dated

Possibly from Old Khmer ltāp, ltap (“to occur one after another”), corresponding to Modern Khmer រដាប់ (rɔdap, “to be in close alignment”); extended as laṃtāp, laṃtap (“order, sequence, series; to arrange in orders, sequences, or series; etc”), corresponding to Modern Khmer លំដាប់ (lumdap), from which Thai ลำดับ (lam-dàp) was derived.

ระดับ • (rá-dàp)

1. level; class; rank; degree; order; sequence.

ระดับ • (rá-dàp) (abstract noun การระดับ)

1. (archaic) to arrange or place in levels, classes, ranks, degrees, orders, sequences, etc.
2. to put or place in a horizontal position or position of rest; to set down.