Question

1. knowing that -ous means \full of or having the quality of,\ what can you infer about the meaning of poisonous?

lacking any poison.
having a little bit of poison, but mostly harmless.
full of poison or capable of causing harm through poison.
something that cures or removes poison.

Explanation:

The word "poisonous" implies being full of poison or having the quality of causing harm through poison. Options like lacking any poison or being mostly harmless don't align with the typical meaning of "poisonous". Something that cures or removes poison is an antidote, not what "poisonous" means.

Answer:

Full of poison or capable of causing harm through poison.