似…非…sì…fēi…嵌用同一个单音名词、形容词或动词,表示又像又不像的意思{(each of these two words followed by the same word to indicate paradox of similarity and dissimilarity) look like but not be; smack of}: ～绸～绸{It looks like silk but is not.}|～蓝～蓝{look to be blue but is not}|～笑～笑{imperceptible smile}|～懂～懂。{have only a hazy notion; not completely understand}