Open Game Content: Source
You can use this skill to frighten your opponents or to get them to act in a way that benefits you. This skill includes verbal threats and displays of prowess.
Check: You can use Intimidate to force an opponent to act friendly toward you for 1d6 × 10 minutes with a successful check. The DC of this check is equal to 10 + the target's Hit Dice + the target's Wisdom modifier. If successful, the target gives you the information you desire, takes actions that do not endanger it, or otherwise offers limited assistance. After the Intimidate expires, the target treats you as unfriendly and may report you to local authorities. If you fail this check by 5 or more, the target attempts to deceive you or otherwise hinder your activities.
Demoralize: You can use this skill to cause your opponents to become shaken for a number of rounds. The DC of this check is equal to 10 + the target's Hit Dice + the target's Wisdom modifier. If you are successful, the target is shaken for 1 round. This duration increases by 1 round for every 5 by which you beat the DC. You can only threaten opponents in this way if they are within 30 feet and can clearly see and hear you.
Action: Using Intimidate to change an opponent's attitude requires 1 minute of conversation. Demoralizing an opponent is a standard action.
Try Again: You can attempt to Intimidate an opponent again, but each additional check increases the DC by +5. This increase resets after 1 hour has passed.
Special: You also gain a +4 bonus on Intimidate checks if you are larger than your target and a –4 penalty on Intimidate checks if you are smaller than your target.
If you have the Persuasive feat, you get a bonus on Intimidate checks (see Feats).
A half-orc gets a +2 bonus on Intimidate checks.