1 عمومی:: لاقیدی، سهل انگاری، پشت گوش فراخی
شبکه مترجمین ایران
1 general:: noun ADJ. cool VERB + NONCHALANCE affect, feign, pretend She shrugged, feigning nonchalance. PREP. with ~ declining the offer with cool nonchalance PHRASES an air of nonchalance ‘Oh, by the way … ’ she started, with a false air of nonchalance.
Oxford Collocations Dictionary