1. Wrong use of language 
2. Bad treatment; abuse

Derived forms: misusages

• fieriness
• fiery
• fiesta
• fiesta flower
• FIFA
• fife
• fife rail
• fifer
• FIFO
• fifteen
• fifteenth
• fifth
• Fifth Amendment
• Fifth Avenue
• fifth column
• fifth columnist
• fifth cranial nerve
• Fifth Crusade
• Fifth Lateran Council
• fifth part
• fifth wheel
• fifthly
• fifties
• fiftieth
• fifty