silver birch

common birch tree with a light grey bark 欧洲桦.

silicon, silicon chip, silicone, silicosis, silk, silk-screen printing, silken, silkiness, silkworm, silky, sill, sillabub, silliness, silly, silly (also silly-billy), silo, silt, silty, silvan (also sylvan), silver, silver jubilee, silver paper, silver plate, silver wedding, silver-fish, silver-plated, silver-tongued, silver-ware, silverside, silversmith, silverware, silvery, simian, similar, similar to, similarity, similarly, simile, similitude, simmer,