Wily: careful planning, far-reaching planning. Describe people as smart and sophisticated.
Unfathomable: Too deep to be measured. Metaphor is unpredictable about the situation of things.
Unfathomable: An unfathomable degree. This description is difficult to understand.
Ulterior motives: ulterior motives: intentional; Hey: no; Test: guess. It means dangerous and unpredictable.
Exhaustion: scheming: scheming. Do your best.
Intrigue: originally refers to the crisscross and exquisite structure of the palace building. After metaphor exhausted scheming, infighting.
The intrigue between the concubines in the harem
Have a shrewd mind: describe the deep heart, not exposed, difficult to peep.