(chemistry) fluorene; a white crystalline organic compound extracted from coal tar used to make dyes and pesticides

(archaic) a name for an edible wild plant, possibly the radish or a similar root vegetable; also known as 菲 fěi

(literary) suddenly; abruptly; synonymous with 忽 hū

(literary) vaguely; indistinctly; used in the term 恍惚 huǎng​hū meaning blurred or absent-minded

an annual herb with light purple flowers; its tender stems and leaves are edible and its seeds can be used for oil