Lewis and Wigen assert, "The narrowing of 'Southeast Asia' to its present boundaries was thus a gradual process.
lˈuːɪs ænd wˈaɪdʒən ɐsˈɜːt, "ðə nˈæɹoʊɪŋ ʌv sˈaʊθiːst ˈeɪʒə tʊ ɪts pɹˈɛzənt bˈaʊndɚɹiz wʌz ðˈʌs ɐ ɡɹˈædʒuːəl pɹˈɑːsɛs.