Thin

жи́дкий

žídkij

(of low viscosity or low specific gravity — see also watery, liquidy, diluted)

разрежённый

razrežónnyj

(of low viscosity or low specific gravity — see also watery, liquidy, diluted)

ре́дкий

rédkij

(of low viscosity or low specific gravity — see also watery, liquidy, diluted)

ре́дкий

rédkij

(scarce)

теку́чий

tekúčij

(of low viscosity or low specific gravity — see also watery, liquidy, diluted)

то́нкий

tónkij

(having little thickness or extent from one surface to its opposite)

то́нкий

tónkij

(very narrow in all diameters; having a cross section that is small in all directions)

то́щий

tóščij

(having little body fat or flesh; slim; slender; lean; gaunt)

худо́й

xudój

(having little body fat or flesh; slim; slender; lean; gaunt)