This is the 536th most frequent Chinese word.
尽管
"尽管" means "even though" or "feel free to."
In this sentence, '尽管' is used as a conjunction meaning 'although' to introduce a concessive clause.
尽管天很冷,他还是坚持晨跑。
Although it was very cold, he still persisted in jogging in the morning.
Here, '尽管' conveys an assurance or permission, equivalent to 'feel free to' or 'you can'.
你尽管放心,我会帮你处理好这件事情的。
You can rest assured, I will handle this matter for you.
This instance of '尽管' again acts as a conjunction, introducing a clause expressing a circumstance that counters expectations.