Question about radicals
One source says that the radical for the character 累 (lèi, tired）is radical 田 (tián, field). Another source says that it is radical 糸 (mì, silk). Can a character have more than one radical? Would 累 be listed in most Chinese dictionaries under both 田 and 糸, or under only one of the two? Is there a "right answer", or could different dictionaries list the same character as having a different radical? (In English, different dictionaries could list different definitions for the same word - it is just the opinion of the editors of a particular dictionary - there is no "right answer" whether a particular definition is valid for a word.)

Question

Question about radicals
One source says that the radical for the character 累 (lèi, tired）is radical 田 (tián, field).  Another source says that it is radical 糸 (mì, silk).  Can a character have more than one radical?  Would 累 be listed in most Chinese dictionaries under both 田 and 糸, or under only one of the two?  Is there a "right answer", or could different dictionaries list the same character as having a different radical?  (In English, different dictionaries could list different definitions for the same word - it is just the opinion of the editors of a particular dictionary - there is no "right answer" whether a particular definition is valid for a word.)

Answer

糸（jiao）绞丝底（jiao si di ）different dictionaries list the same character as having a different radical “甥”，“舅”二字，《说文解字》根据六书体系，都归“男”部；《康熙字典》则依检字法原则，以“甥”入“生”部，“舅”入“臼”部。 
ps 六书一是指汉字的造字方法，即“象形、指事、会意、形声、转注、假借”。 
Not a few words can explain the clear. 
i dont know if you can read chinese .if you can ,then go to this website. http://baike.baidu.com/view/277746.htm 
when i in primary school,teacher told me how to use dictionaries,if a word have two radicals.normally try the easy simple one,if cant find the word,then another.so if you let me to find 累 in dictionary,i will try 田 first.
hope my answer can help you,

Answer

累 has two radicals. It is listed in dictionaries under both radicals. However, 田  would be the prime radical as it is at the top.

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