This command unlocks (adds to your target's spell list) the shout with the specified ID. Use 'player.addshout' to add a shout to your own spell list. Make sure you have the spell the shout is a part of also unlocked, otherwise it won't work.
addshout [shout id] Target Command
|Shout ID||The ID of the shout you wish to unlock.|
Animal Allegiance (Raan) has a shout ID of 00060291. This command would add Animal Allegiance to your current target's spell list.
This command is very similar to the first example but adds the shout to your character's spell list (as 'player.addshout' is used).