IPA: //ˈseɪntliːəst//
KK: /ˈseɪntliːəst/
The most virtuous or holy; having the highest moral qualities.
She is known for her saintliest actions, always helping those in need.
Saintliest → It is formed from "saint" (from Old French *saint*, meaning holy or sacred) and the superlative suffix "-liest" (meaning most). The word "saintliest" means the most holy or sacred among a group.
Think of the word 'saint' meaning holy, and remember that 'saintliest' refers to the most holy or sacred person.
No commonly confused words.