気密性 きみつせい Meanings Noun airtightness Kanji 気 spirit. Read as キ. 密 dense. Read as ミツ. 性 nature. Read as セイ. Example sentences 気密性でない窓ならば、水滴ができるだろう。If your windows are not airtight, moisture will seep in. Common phrases 気密性が高い Jinuma: Japanese Dictionary · Word lists