Buying a beautiful Christmas tree is trickier than just choosing a green one.
Relationship stress is a bit trickier than physical stress because by its very nature, many things in relationships are intangible.
When using look-ahead assertions and negations, this can all get even trickier.
The auger boring on Igoe's job was a tad trickier than Perco allowed for.
In Linux, installing a mod is somewhat trickier.