Rooted

Rooted is a perk in Fallout 4.

Effects
This perk is activated any time the player character stops moving, either following a melee block action, activating V.A.T.S., or simply releasing the move button before attacking. Using this perk requires some practice, but it can be very effective for a brawler character focusing on Strength and Endurance.

Ranks
While the flat addition to damage resistance can substantialy increase survivability for the player character if they are wearing little to no armor, returns for this effect of the perk may diminish quickly.

The increase in damage dealt affects melee weapons, as well as fist weapons. This includes the rusty knuckles, hydraulic bracers and Tesla bracers arm modifications for power armor.

Rank 3 introduces a 25% chance for an attacker to get disarmed upon hitting the player character with a melee weapon, while attackers using unarmed weapons are not affected.

Bugs
The in-game description states that this perk increases damage resistance only, while in fact it also increases energy resistance by the same amount as can be seen in the statistics displayed in the inventory apparel menu of the Pip-Boy.