for the most part; he is mainly interested in butterflies
[ Syn: chiefly , chiefly , primarily , primarily , mainly , mainly , in the main , in the main , chiefly , chiefly , primarily , primarily , mainly , mainly , in the main , in the main , chiefly , chiefly , primarily , primarily , mainly , mainly , in the main , in the main , chiefly , chiefly , primarily , primarily , mainly , mainly , in the main , in the main ]