खीर —     खीरा —     टेढ़ा / टेढ़ी —      

खीर  f) sweetened preparation of rice and milk boiled together; typical sweet Indian dish 

खीरा  m) cucumber

टेढ़ी खीर  hard nut to crack, difficult job

टेढ़ा/टेढ़ी  a) curved, bent, oblique, skew (torcido, sesgado); difficult, intricate