IPA: /træŋˈkwɪli/
KK: /træŋˈkwɪli/
In a calm and peaceful way, without disturbance or agitation.
She spoke tranquilly, calming everyone in the room.
Tranquilly → It is formed from "tranquillus" (meaning calm or quiet) and the adverbial suffix "-ly" (meaning in a manner of). The word "tranquilly" means in a calm or quiet manner.
Think of being calm and quiet ('tranquillus') and how you do that 'in a manner of' ('-ly'). This helps you remember that 'tranquilly' means to act in a calm way.