ex mero motu /eks mēˈrō mōˈtū or merˈō mōˈtoo/

1. From his or her own impulse
2. Of his, her or its own accord

• horse-milliner
• horse mills
• horsemint
• horsemints
• horse mushroom
• horse mushrooms
• horse mussel
• horse mussels
• horse nail
• horse nails
• horse of a different colour
• horse opera
• horse operas
• horse pistol
• horse pistols
• horseplay
• horseplays
• horsepond
• horseponds
• horsepower
• horsepowers
• horse race
• horse races
• horse-racing
• horseradish