まぐるしい
memagurushii

i-Adjective

1. dizzying (speed, changes, etc.); rapid; drastic; bewildering; hectic; bustling (e.g. world)

Usually Written in Kana
ここ すう じつ天気 てんきがめまぐるしく わっている。
koko sūnichi tenkiga memagurushikukawatte iru.
We've had all kinds of weather over the past few days.
Other forms: