Acidic (adjective)

1. Having a pH less than 7, or being sour in taste.
2. Being sharp or biting in manner or tone.
3. Relating to or having the properties of an acid.

Origin:

From the latin word "acidus" meaning "sour".

Examples:

1. The soil in this area is known to be highly acidic, which makes it difficult to grow certain crops.
2. The acidic nature of lemons makes them a great ingredient for cleaning and polishing.
3. The acidic comment made by the speaker left a sour taste in the audience's mouth.
4. The acidic rain caused by pollution can damage buildings and monuments.
5. Acidic foods and drinks can erode the enamel of your teeth.