You can do unfocused and uncontrolled magic without a wand (for instance when Harry blows up Aunt Marge) but to do really good spells, yes, you need a wand. A wizard or witch is only at their best when using their own wand. When using another's wand, one's spells are not as strong as they normally would be.
On 2 August 1995, Harry Potter unknowingly performed underage wandless magic in an alleyway in Little Whinging due to the presence of Dementors, with Harry speaking the incantation for the Wand-Lighting Charm aloud (Lumos) despite not holding his wand which he had dropped in the darkness, which instantly illuminated
Albus Dumbledore casting Aresto Momentum without a wand. A wandless spell is a spell which is performed without the use of a wand. This form of magic can be particularly volatile, and can only be used effectively by powerful and disciplined wizards and witches.
To perform magic without a wand is beyond most wizards. As much like fire, magic can be raging, chaotic and volatile – that's why wizards use wands to channel it – and requires the utmost skill and discipline to control. Wandless magic is like riding a bike with no hands.
10 Hermione Granger Her wandless magic can be seen prominently in The Half-Blood Prince. She performs Confundus on Cormac McLaggen simply by whispering into her hand. She also successfully performs Avis and Oppugno Jinx without the use of her wand when sending birds to attack Ron.
Lord Voldemort was also able to practice powerful wandless magic. Those that practiced magic, however, were generally "gifted in animal and plant magic," with the ability to brew sophisticated potions "beyond much that was known in Europe" at the time -- and they did this all without the use of a wand.
Owners. Hagrid's Pink Umbrella was an umbrella owned by Rubeus Hagrid in which he concealed the pieces of his broken wand, after he was expelled from Hogwarts School of Witchcraft and Wizardry in 1943.
Hagrid didn't have his magic taken away - that's not possible. He had his wand snapped, although later Dumbledore had it secreted inside his umbrella.
Dumbledore did not fix Hagrid's wand. In fact, there is no evidence of anyone fixing Hagrid's original wand.
Spooner finds the area in Sonny's drawing: a dry lake bed formerly Lake Michigan, now used as a storage area for decommissioned robots. All NS-5 robots immediately revert to their default programming and are subsequently decommissioned and put into storage.
So, when someone tells you that they've “Got Your 6,” it means they're watching your back. By extension, that person expects you to have their back as well.