From Longman Dictionary of Up to date Englishbecomebe‧occur /bɪˈkʌm/ ●●● S1 W1 verb (earlier tense turned /-ˈkeɪm/, previous participle become)    1 [linking verb]BECOME to begin to have a sense or top quality, or to start to produce into anything  The climate became hotter.  Slowly but surely my eyes turned accustomed for the dark