Duryoga
Definition.-If the lord of the 10th is situated in the 6th, 8th or 12th, Duryoga is caused.
Results.-The person will not derive the fruits of his own bodily exertion; he will be looked down by others; highly selfish and always intent upon deceiving others, he will live in a foreign place.
Remarks.-The 10th is the pivot of the horoscope and its lord should be strong if one’s life is to be tolerably happy. When the 10th lord is in Dusthanas he will lose his vitality and is therefore said to confer on the native just those qualities which render him insignificant in the eyes of the public. Harming others, selfishness and gluttony are not qualities conducive
to making one virtuous. One who has Duryoga is supposed not to derive the benefits of his own bodily exertions. Duryoga seems to indicate that one would earn his livelihood by manual labour. Of the three Dusthanas, the 12th seems to be the least malefic so far as this Yoga is concerned, because whilst depriving one of the fruits of his labours, it will at least give him noble qualities and therefore a certain amount of respect in society.
Note by Pandit S.P.Tata: Just because the 10th lord is in a dusthana, all negativeness mentioned above may not fructify as I have seen may whose 10th lord is similarly placed but who did well in life and are decent and respected. The placement of Bhagyadhipati 9th lord and the presence of rajayogas and other good yogas can change quite a few things. If the 10th lord is a malefic and placed in a dusthana, it will give many good results also. However this placement gives some struggle in profession.