Compleasant
Easy going, relaxed, one who doesn't overreact, not worried
A high school student was compleasant about his upcoming final exam.
When arguing with his girlfriend, he remained compleasant
When arguing with his girlfriend, he remained compleasant
compleasancy
Describing an incredibly pleasant state of affairs that render one complacent to a fault
She is dating this incredibly boring but incredibly nice guy - lulling her into compleasancy.