"투" means "a style, way or manner as a fixed habit (of one's writing, speaking or behavior) ". for examples. 어투, 말투, a way of speaking 상투적인 말, conventional words 공격적인 어투, aggressive tone 그는 항상 비꼬는 투로(말투로/어조로) 말을 한다. 영어번역 투의 문장은 자연스럽지 않다. 나는 그의 사람들을 막 대하는 투를 좋아하지 않는다.

Korean is a context based language. A lot of the words have many different meanings depending on the context. Just quoting one word from a passage is very hard to tell what they mean. so it is important to have an example to nail down the meaning. the sino-korean word 투 (鬪) means combat, fight. e.g. 권투 (boxing) but this is just one meaning. It does not cover all possibilities.

Try this site: http://endic.naver.com/krenEntry.nhn?entryId=4932a150bcc9420aba3e61aa53df2587&query=%ED%88%AC