The words "precipitous" and "embittered" convey a tone that leans towards foreboding.
- "Precipitous" often refers to something steep or sudden, suggesting a sense of danger or an alarming change, which can evoke feelings of anxiety or tension.
- "Embittered" implies a sense of deep resentment or disappointment, hinting at past grievances that have soured one's perspective, further contributing to a somber or dark emotional landscape.
Together, these words suggest a tone that anticipates trouble or reflects negative emotions, fitting best with the option of a foreboding tone.