Correct spelling

equipped

Correct spelling, explanation: equipped is a tricky word, because at the first glance there is no consonant-vowel-consonant combination, so it doesn’t seem like p should be doubled. However in case of q standing before u, u behaves like a consonant, so technically we have the combination in case of equip. Therefore equipped is the correct spelling and equiped is incorrect.

Definition of equipped:
verb, past simple and past participle form of equip, to provide with needed supplies, to furnish
I equipped the kitchen today with new coffee machine and a toaster.
adjective, to be fully provided with what is needed
Are we fully equipped for tomorrow hiking?


Incorrect spelling

equiped

Incorrect spelling, explanation: equiped is an incorrect form because u standing after q is treated like a consonant, so there is a consonant-vowel-consonant combination at the end of equip. In such case we double the last consonant when we add a suffix (equip plus -ed is equipped), so equipped is the correct form.