Common Meanings
1
fēi蜚
When pronounced fēi, "蜚" is often used interchangeably with "飞" to mean baseless or groundless, especially referring to rumors. It's most commonly seen in the idiom "流言蜚语" (liú yán fēi yǔ), which means groundless rumors or gossip.
他不可能会因为那些流言蜚语而轻易放弃自己的目标。
It's impossible for him to easily abandon his goals because of those groundless rumors.
2
fěi蜚
Refers to '蜚蠊' (fěi lián), meaning cockroach.
厨房里有几只蜚蠊。
There are a few cockroaches in the kitchen.