(idiomatic, used to convey serious intent) To be serious, especially where achieving a specific end against opposition is concerned.

(archaic, formal) Under no circumstances whatsoever; not at all.

(astronomy, celestial mechanics) An orbital parameter of a celestial body (in an elliptic orbit); the mean motion multiplied by the time since the last passage through periapsis; the angle PCM (measured in radians) defined by P = the periapsis, C = the center of the elliptical orbit, and M = the mean planet.

Using whatever method or strategy is required. / (idiomatic) In any manner whatsoever; at all.

A method by which a goal is achieved.

(astronomy, celestial mechanics) An angle of 𝜏 (radians) divided by the orbital period (of a celestial body in an elliptic orbit).

(astronomy, celestial mechanics) An imaginary celestial body (corresponding to another, real, orbiting one) which orbits with constant speed along an auxiliary circle (a circle which shares a diameter with the major axis of the elliptical orbit of the corresponding real celestial body), such that its position coincides with the position of the corresponding, real celestial body when that body passes through periapsis.

Resources for achieving anything. / Schemes for raising money for the carrying on of government.

present participle of mean-mouth

(transitive) To speak unkindly and critically about; to badmouth.