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Results found in several dictionaries: Collins, Collaborative Dictionary
canijo *  adj 
1  (=pequeño) puny 
(=endeble) 
weak, sickly
2  (Méx)  (=astuto) sly

Collaborative Dictionary     Spanish-English
'canijo' found in translations in English-Spanish dictionary
rickety old man n. el anciano canijo Reverso General Dictionary 

"Collins Spanish Dictionary 8th edition published in 2005 © William Collins Sons & Co Ltd 1971, 1988 © HarperCollins Publishers 1992, 1993, 1996, 1997, 2000, 2003, 2005"