刮

guā

to blow (of the wind)

tongue (舌) + knife (刂) = scraping wind

The knife radical (刂) carries the meaning: wind scrapes and cuts across surfaces. 舌 mainly gives the sound guā; the blade does the semantic work.

舌+刂→刮

刂KnifeSemantic

舌TonguePhonetic

雨刮

yǔ guā

windshield wiper

雨刮器

yǔ guā qì

windshield wiper

顶刮刮

dǐng guā guā

variant of 頂呱呱|顶呱呱[ding3 gua1 gua1]

刮风

guā fēng

to be windy

刮伤

guā shāng

scratch (wound)

刮刀

guā dāo

spatula

刮刮卡

guā guā kǎ

lottery scratchcard

刮刮叫

guā guā jiào

variant of 呱呱叫[gua1 gua1 jiao4]

刮刮乐

guā guā lè

scratch-and-win lottery

刮勺

guā sháo

scraper

刮掉

guā diào

to scrape off

刮擦

guā cā

to scrape