harmful

Meanings

1. 1
   adj

   causing or capable of causing harm

   too much sun is harmful to the skin

2. 2
   adj

   Causing or likely to cause harm or damage; injurious.

   Wear a hat to protect your skin from harmful sunlight.

Etymology

From Middle English harmful, from Old English *hearmful (suggested by hearmfullīċ (“harmful; hurtful”)), equivalent to harm + -ful. Cognate with German harmvoll, Danish harmfuld, Swedish harmfull.