즉that is 즉석being on the spot 즉석식품instant food 즉석요리instant food 즉시immediately 일촉즉발tinderbox; breaking point; being volatile 즉각immediately 즉각적being immediate 즉각적immediate 즉결summary decision

효과effect; efficacy 효과적being effective; being effectual 효과적effective; effectual 효율적being efficient; being effective 효율적efficient; effective 비효율적being inefficient 비효율적inefficient 특효special efficacy 특효약miracle cure; wonder drug 효과음sound effect