qualm

s. náusea, mareo; escrúpulo; duda, incertidumbre; aprensión, inquietud; remordimiento

náusea

remilgos, hacerle ascos a algo, escrúpulos

Ex: In the article 'Caveats, qualms, and quibbles: a revisionist view of library automation', a public librarian expresses his concern about computers in libraries and the lack of healthy scepticism in libraries when considering the likely benefits of automation.
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*have + no qualms about = no importar en absoluto, no tener ningún escrúpulo en, no tener ningún reparo en

la humareda