IPA: /ˈpiːsfəl/
KK: /ˈpisfəl/
Having a calm and quiet nature, free from disturbance or conflict.
The garden was a peaceful place to relax and think.
Comparative: more peaceful
Superlative: most peaceful
Peaceful → It is formed from "peace" (from Old French *pais*, meaning tranquility or absence of conflict) and "-ful" (meaning full of). The word "peaceful" means full of peace or characterized by tranquility.
Think of 'peace' as tranquility and remember that 'peaceful' means full of tranquility.