dʒˈʌst lˈaɪk ɐn ʌnpˈaʊɚd sˈeɪl, θɹˈʌst kænˈɑːt biː əbtˈeɪnd wɛn mˌeɪkɪŋ hˈɛdweɪ dᵻɹˈɛktli ˌɪntʊ ɐ hˈɛdwɪnd, nˈɔːɹ kæn ɪt biː əbtˈeɪnd wɪðˌaʊt wˈɪnd.
Just like an unpowered sail, thrust cannot be obtained when making headway directly into a headwind, nor can it be obtained without wind.