Minecraft effects

Absorption is a status effect that pads the health bar with extra hearts.

Health Boost is an unused status effect that increases maximum health of an entity.

Bad Omen is a status effect only obtainable from consuming an ominous bottle.

Fatal Poison inflicts damage to entities over time, and can kill both undead and non-undead mobs, similar to Wither.

Hunger is a status effect which causes hunger and saturation to deplete faster than normal.

Speed is a status effect that causes entities to move faster on foot.

Dolphin's Grace is a status effect that increases an entity's speed while they are in water.

Weakness is an effect that decreases attack damage.

Weaving is a status effect that lessens the movement speed decrease from being in a cobweb, as well as causing cobwebs to be placed upon death.

Heals living entities, damages undead

Makes the affected entity invisible (but not the item they hold or the armor they wear), and reduces other mobs' detection range for the affected entity

Oozing is a status effect that causes an entity to spawn two medium-sized slimes upon death.

Slowness is a status effect that decreases walking speed.

Water Breathing is a status effect that prevents or delays drowning, and allows waterlogged beds‌[Bedrock Edition only] to be used.

Increases jump height and reduces fall damage

Fire Resistance is a status effect that grants the affected entity complete immunity to all sources of fire damage.

Saturation is a status effect that restores hunger and saturation‌[JE only].

Gives the entity a 10% chance to spawn between 1 and 3 silverfish when hurt

Raid Omen is a status effect that causes raids to start.

Decreases mining and attack speed

Floats the affected entity upward

Resistance is a status effect that reduces incoming damage.

Strength is a status effect which increases attack damage.

Bad Luck, also known as Unluck, is a status effect found exclusively in Java Edition and Legacy Console Edition that decreases the chance of the player getting high-quality loot, contrary to Luck.

Night Vision is a status effect that enhances the player's ability to see in darkness and underwater.

Wind Charged is a status effect that causes an entity to release a burst of wind upon death.

Regeneration is a status effect that restores an entity's health over time.

Breath of the Nautilus is a status effect that is granted while riding a nautilus or zombie nautilus which prevents the rider's oxygen bar from depleting.

Conduit Power is an area-of-effect status effect given by active conduits to players touching water or rain.

Poison is an effect that inflicts damage over time.

Slow Falling is a status effect that causes midair entities to more gradually descend downward and avoid fall damage, but prevents critical hits and smash attacks.

Darkness is a status effect that impairs a player's vision.

Trial Omen is a variant of the Bad Omen effect, which is granted when a non-ominous trial spawner enters the line of sight of a player with Bad Omen.

Wither is a status effect that inflicts damage over time.

Glowing is a status effect that shows entity positions through blocks.

Luck is a status effect found exclusively in Java Edition and Legacy Console Edition that increases the chances of receiving better loot from certain loot tables.

Haste is a status effect that increases mining efficiency and attack speed.‌[Java Edition only]

Damages living entities, heals undead