guǐ mì
secretive
furtive
surreptitious
guǐ biàn
specious arguments
sophistry
diào guǐ
bizarre
paradoxical
a paradox (from Daoist classic Zhuangzi 莊子|庄子)
guǐ jì duō duān
deceitful in many ways (idiom); wily and mischievous
full of craft and cunning
guǐ biàn shù
specious arguments
sophistry
guǐ biàn jiā
sophist
one who relies on specious arguments
yīn móu guǐ jì
crafty plots and machinations (idiom)