Which word do you hear?
/ðəʊ/ — in spite of, despite the fact that, although
/tʌf/ — hard, difficult, severe
/θruː/ — from one side to the other; with the help of, by means of
/θɔːt/ — idea; past forms of the verb "to think"
/ˈθʌrə/ — careful, detailed, in-depth