however
UK: haʊˈevə | US: haʊˈevər
adv. used to introduce a statement that contrasts with or seems to contradict something that has been said previously
adv. in whatever way; regardless of how
The word "however" combines "how" (Old English hū, meaning "in what way") and "ever" (Old English ǣfre, meaning "always" or "at any time"). Originally, it emphasized indefiniteness ("in whatever way"), but by the 14th century, it evolved to introduce contrast or opposition, reflecting a shift from open possibility to contradiction.
She wanted to go; however, her parents refused.
However you solve the problem, make sure it’s efficient.
The plan seemed perfect; however, it failed in practice.
However hard he tried, he couldn’t win the race.
The results were unexpected; however, they were accurate.