v.使人哑然失声，使发楞...

dumbfound的一般过去时为：dumbfounded...

dumbfound的现在完成时为：dumbfounded...

dumbfound的音标：dumbfound的英式发音音标为：[dʌm'faʊnd]dumbfound的美式发音音标为：['dʌmˌfaʊnd]...

dumbfound的第三人称单数（三单）为：dumbfounds...

dumbfound的现在进行时为：dumbfounding...