三伏 sānfú dog days Definitions Defs Origin Strokes Stroke Words Sentences Sents sānfú dog days 三 sān numeral three the number three; 3伏 fú dog days the hottest days of summer; the three ten-day periods following the summer solsticesānfú third period of summer 三 sān numeral third the third in a series; ordinal number three伏 fú dog days the hottest days of summer; the three ten-day periods following the summer solsticesānfú triple ambush 三 sān numeral three the number three; 3伏 fú adjectivenoun to hide to conceal oneself; to lie in ambush; to stay hidden