difficult to penetrate; incomprehensible to one of ordinary understanding or knowledge; "the professor's lectures were so abstruse that students tended to avoid them"; "a deep metaphysical theory"; "some recondite problem in historiography"
cause to withdraw; "We pulled this firm off the project because they overcharged"
be successful; achieve a goal; "She succeeded in persuading us all"; "I managed to carry the box upstairs"; "She pulled it off, even though we never thought her capable of it"; "The pianist negociated the difficult runs"
requiring more than usually expected or thought due; especially great patience and effort and skill; "found the job very demanding"; "a baby can be so demanding"
having three units or components or elements; "a ternary operation"; "a treble row of red beads"; "overcrowding made triple sessions necessary"; "triple time has three beats per measure"; "triplex windows"