diatonic
- a based on the standard major or minor scales consisting of 5 tones and 2 semitones without modulation by accidentals
- s based on or using the five tones and two semitones of the major or minor scales of western music
dicey
- s of uncertain outcome; especially fraught with risk
an extremely dicey future on a brave new world of liquid nitrogen, tar, and smog"- New Yorker