Depression

adjective An adjective is a word that describes or modifies a noun or pronoun. 'Friendless' describes someone who lacks friends or companionship.

• She often felt friendless in the new city where she didn't know anyone.
• After the fight, he was left feeling completely friendless.
• I can't believe she ditched me at the party, now I'm friendless.
• The abandoned house stood dark and friendless, as if it had been forgotten by time.

noun a symptom of various medical conditions

• The patient reported experiencing brain fog as a side effect of the medication.
• I can't think straight today, I have such bad brain fog.
• I feel like my brain is full of cobwebs, I've got major brain fog.
• After pulling an all-nighter, my brain felt like it was covered in a thick layer of fog.