Can you put Sharpness on a trident?
No. You can't put Sharpness on a trident in Bedrock 26.60, not even with an anvil.
Why not
Sharpness is not on the trident's list. Here is what a trident can take instead: Curse of Vanishing, Riptide, Channeling, Impaling, Loyalty, Unbreaking, Mending.
What that means in practice
Tridents have their own damage enchantment, Impaling, and Sharpness isn't on their list. The two also exclude each other. In Bedrock, Impaling adds damage to any mob in water or rain, which makes it a strong all-round pick.
What to use instead
Impaling is the trident's damage enchantment. It adds 2.5 damage per level, against aquatic mobs in Java and against anything in water or rain in Bedrock. On a fresh trident, Impaling V costs 5 levels and Loyalty III costs 3 levels as a book.
The trident hits hard without help. Its melee damage already matches an unenchanted diamond sword. So a trident with Impaling makes a decent melee weapon as well as a thrown one.
See Impaling and Loyalty, or the full trident build.
Why the game says no
Sharpness only goes on sword, axe and spear. A trident is not on that list. That matters because Bedrock checks a built-in list of items for each enchantment. So the anvil gives no result, and the enchanting table never offers it.
No survival trick changes that. Combining two items, renaming or using a grindstone first all leave the list the same.
The best trident build instead
So a max trident has Channeling, Impaling V, Loyalty III, Unbreaking III and Mending. In the cheapest order it costs 28 levels over 5 anvil steps, and no step goes above 9. Open it in the calculator.
The best trident enchantments page explains every book, and the trident enchant order shows each anvil step.
Where Sharpness goes
- Sharpness goes on sword, axe and spear. Books on an anvil work on all of them. Related questions: Sharpness on axe, Sharpness on mace, Sharpness on spear.
Commands and creative mode
The /enchant command refuses too, because a trident can't take Sharpness. Bedrock's /give can't add enchantments, so there is no way around it. The command generator writes the right syntax for your edition.
Java and Bedrock
In Bedrock, Impaling hits any mob in water or rain. In Java it only hits aquatic mobs. Sharpness is stronger in Bedrock: +6.25 at level V, against +3 in Java. The anvil also differs: Bedrock only charges for the levels a book adds. This page follows Bedrock 26.60.
About Sharpness
Sharpness adds melee damage against every mob and player. In Bedrock Edition each level adds 1.25 damage, for +6.25 at Sharpness V.
Sharpness has a max level of V. If you need a book, you can get it from the enchanting table, librarian villagers, gear worn by trial chamber mobs, trial chamber vaults and enchanted loot from fishing and chests. Before you buy, read everything about Sharpness, including what each level does.
What else a trident can take
Instead, a trident can take Riptide, Channeling, Impaling, Loyalty, Unbreaking and Mending. Then the best trident enchantments page ranks them and gives the max build.
Related questions: Mending on trident, Looting on trident, Loyalty and Riptide on trident.
Questions
Can you put Sharpness on a trident?
No. You can't put Sharpness on a trident in Bedrock 26.60, not even with an anvil.
What else can Sharpness go on?
sword, axe and spear.
What does Impaling do?
In Bedrock it adds 2.5 damage per level against any mob in water or rain.
Does Sharpness work on a thrown trident?
No. Sharpness can't go on a trident at all. Impaling is the trident's damage enchantment.
Can a trident get Sharpness from an enchanting table or a villager?
No. The enchanting table only offers enchantments an item supports. A villager's Sharpness book still can't go on a trident, because the anvil checks the same list.