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Friction The force that opposes motion between two surfaces in contact. ■ "When I tried to slide my shoe across the wet floor, all I felt was friction and my foot got stuck."
Chapped To be in a state of extreme discomfort or irritation due to dryness or friction. ■ "I'm so chapped from all the sunburn on my arms! I think I need some lotion."
lubricant A substance that is applied to an object or surface to reduce friction and make motion easier. ■ "I need some lubricant for my rusty hinges."
lubricants A substance that is applied to moving parts or surfaces to reduce friction, wear and tear. ■ "He put some lubricants on his bike chain before he went for a ride. But it was still squeaky!"
ruffled adjective 1. Having or appearing to have been disturbed, agitated, or disordered by rough treatment, friction, etc. ■ After getting lost in the city's crowded streets, John was understandably ruffled and disoriented.
squeak An extremely loud and high-pitched sound made by the friction of two hard surfaces rubbing together. ■ "The old wooden floorboards creaked loudly when I walked on them, causing me to jump out of my skin!"
blisters Small, painful bubbles that form on the skin when it is exposed to heat or friction. ■ When I went for a run in my new shoes, I got so many blisters on my feet that I could barely walk!
rubs A pastime that involves rubbing two objects together in a circular motion to produce friction and heat, typically for the purpose of cleaning or polishing. ■ "I spent hours every week rubbing my shoes on the rug to make them look new again."