間隙 is read as かんげき (kangeki) and means gap.
かんげき
kangeki
かんげきひ
void ratio
しなぷすかんげき
synaptic cleft
すきま
chink (in one's armor, armour)
すきましじょう
niche market
すきまなく
closely
どうさすきま
differential gap
すきまかぜ
cooling off of a relationship
すきまのかみ
God of the gaps
あいだ
among (a group)
まじか
near
まにあわせ
makeshift
かんせつ
indirection