渋い【しぶい】
astringent, bitter, puckery, rough, harsh, tart, austere, elegant (and unobtrusive), refined, quiet (and simple), sober, sombre, subdued, tasteful (in a quiet way), understated, sour (look), glum, grim, sullen, sulky, stingy, tight-fisted
渋る【しぶる】
to be reluctant (to do), to be unwilling (to do), to hesitate (to do), to grudge, to be tardy (in doing), to put off (doing), to falter, to slacken, to slow down, to have a frequent urge to defecate but difficulty passing stool, to suffer from tenesmus