Tranquilly is a related term of meekly.
As adverbs the difference between tranquilly and meekly
is that tranquilly is in a tranquil manner while meekly is in a meek manner; quietly and humbly.
meekly
English
Adverb
(
en adverb)
In a meek manner; quietly and humbly.
* 1673 ,
- When Faith and Love which parted from thee never
- Had ripen'd thy just soul to dwell with God,
- Meekly thou did'st resign this earthly load
- Of Death, call'd Life; which us from Life doth sever.