sanguine

adj. 充满希望的，乐观的, 血红色的

sandalwood, sandbag, sandbank, sandboy, sandiness, sandpaper, sandpiper, sands, sandstone, sandstorm, sandwich, sandwich board, sandwich course, sandy, sane, sanely, sang, sang-froid, sangria, sanguinary, sanguinely, sanguineness, sanitarium, sanitorium, sanitary, sanitary towel, `sanitary pad, sanitation, sanitize, sanitise, sanity, sank, sanserif, Santa Claus, sap, sapience, sapient, sapiently, sapling, Sapphic, Sapphic (also sapphic), sapphire, sappy,