រដ្ឋធម្មនុញ្ញ • (rôdthâthmmônŭnhnh)
From រដ្ឋ (rôdthâ) + ធម្មនុញ្ញ (thômmônŭnhnh), probably from Thai รัฐธรรมนูญ (rát-tà-tam-má-nuun). Officially used for the first time in 1947.