Rules Glossary — page 181

Deafened [Condition] While you have the Deafened condition, you experience the following effect.

Can't Hear. You can't hear and automatically fail any ability check that requires hearing. Death Saving Throw A player character must make a Death Saving Throw (also called a Death Save) if they start their turn with 0 Hit Points. See also "Playing the Game" ("Damage and Healing"). Dehydration [Hazard] A creature requires an amount of water per day based on its size, as shown in the Water Needs per Day table. A creature that drinks less than half the required water for a day gains 1 Exhaustion level at the day's end. Exhaustion caused by dehydration can't be removed until the creature drinks the full amount of water required for a day.

See also "Exhaustion." Water Needs per Day

Size Water

Tiny 1/4 gallon Small 1 gallon Medium 1 gallon

Size Water

Large 4 gallons Huge 16 gallons Gargantuan 64 gallons Difficult Terrain If a space is Difficult Terrain, every foot of movement in that space costs 1 extra foot. For example, moving 5 feet through Difficult Terrain costs 10 feet of movement. Difficult Terrain isn't cumulative; either a space is Difficult Terrain or it isn't.

A space is Difficult Terrain if the space contains any of the following or something similar:

• A creature that isn't Tiny or your ally

• Furniture that is sized for creatures of your size or larger

• Heavy snow, ice, rubble, or undergrowth

• Liquid that's between shin- and waist-deep

• A narrow opening sized for a creature one size smaller than you

• A slope of 20 degrees or more Difficulty Class A Difficulty Class (DC) is the target number for an ability check or a saving throw. See also "Playing the Game" ("D20 Tests"). Dim Light An area with Dim Light is Lightly Obscured. See also "Lightly Obscured" and "Playing the Game" ("Exploration"). Disadvantage If you have Disadvantage on a D20 Test, roll two d20s and use the lower roll. A roll can't be affected by more than one Disadvantage, and Advantage and Disadvantage on the same roll cancel each other. See also "Playing the Game" ("D20 Tests").

Disengage [Action] If you take the Disengage action, your movement doesn't provoke Opportunity Attacks for the rest of the current turn. Dodge [Action] If you take the Dodge action, you gain the following benefits: until the start of your next turn, any attack roll made against you has Disadvantage if you can see the attacker, and you make Dexterity saving throws with Advantage.

You lose these benefits if you have the Incapacitated condition or if your Speed is 0. Emanation [Area of Effect] An Emanation is an area of effect that extends in straight lines from a creature or an object in all directions. The effect that creates an Emanation specifies the distance it extends.

An Emanation moves with the creature or object that is its origin unless it is an instantaneous or a stationary effect.

An Emanation's origin (creature or object) isn't included in the area of effect unless its creator decides otherwise. Encounter An encounter is a scene in an adventure that is part of at least one of the game's three pillars: social interaction, exploration, or combat. See also "Playing the Game" ("Social Interaction," "Exploration," and "Combat"). Enemy A creature is your enemy if it fights against you in combat, actively works to harm you, or is designated as your enemy by the rules or GM. Exhaustion [Condition] While you have the Exhaustion condition, you experience the following effects.

Exhaustion Levels. This condition is cumulative. Each time you receive it, you gain 1 Exhaustion level. You die if your Exhaustion level is 6.

D20 Tests Affected. When you make a D20 Test, the roll is reduced by 2 times your Exhaustion level.

Speed Reduced. Your Speed is reduced by a number of feet equal to 5 times your Exhaustion level.

Removing Exhaustion Levels. Finishing a Long Rest removes 1 of your Exhaustion levels. When your Exhaustion level reaches 0, the condition ends.