けい
kei

Suffix

1. form

進行しんこうけいぶんでは、動詞どうしing形けい、つまり現在げんざい分詞ぶんしとなります。
shinkōgatano bundewa dōshino ingugatatsumari genzai bunshito narimasu
In a progressive tense sentence it becomes the -ing form verb, that is the present participle.
Noun

2. adjective; i-adjective (in Japanese)

Abbreviation
Linguistics
Related to 形容詞