though
Collins Cobuild Advanced American English Dictionary.iconYou use though to introduce a statement in a subordinate clause which contrasts with the statement in the main clause.
You often use though to introduce a fact which you regard as less important than the fact in the main clause.
Though the weather was FREEZING, they set out on their hike with unwavering determination." （天候は凍えるほど寒かったが、彼らは揺るぎない決意でハイキングに出発した。）
https://gyazo.com/f7e51cced2b049241f0608f9ce44a552
Though he tried hard, nothing changed.（尽力したが、徒労に終わった）
対比
https://youtu.be/NYp1swVthMs?si=j7EM4KNTZ5MI2ErB
かなりいい説明！
文末のthough