1. (lack of ornamentation
"the room was simply decorated with great restraint")
chasteness, restraint, simplicity, simpleness
synonim: prostota
synonim: niewymyślność
synonim: oszczędność

2. ( (of hair) lack of a tendency to curl)
straightness: :

3. (a lack of penetration or subtlety
"they took advantage of her simplicity")
simplicity, simpleness, simple mindedness: :

straightness