Command

Command is an enchantment spell forcing a subject to briefly obey a one-word command. The spell is language-dependent.

Effect
You give the subject a one-word command, which she obeys to the best of her ability. A very reasonable command causes the subject to suffer a penalty on the saving throw (from -1 to -4, at the DM's discretion). Typical commands are "Flee," "Die" (which causes the subject to feign death), "Halt," "Run," "Stop," "Fall," "Go," "Leave," "Surrender," and "Rest". (A command of "Suicide" fails because "suicide" is generally used as a noun, not as a verb.)