The Hebrew that is translated as “smoother” or “softer” (than oil) in English is reinforced in Sar with the ideophone (a word that expresses what is perceived by the five senses) lɔ́ḿ lɔ́ḿ to express the slowness and flexibility (“His words are colder lɔ́ḿ lɔ́ḿ than oil.”) (Source: Ngarbolnan Riminan in Le Sycomore 2000, p. 20ff. )
See also smooth.