Disastrous
Meaning: causing great damage.
Example of using it in a sentence “Disastrous flood waters swept through my bedroom and all my homeschooling evidence was destroyed."
The root word comes from the Italian meaning disaster.
Spelling tip: we are going to help ourselves by breaking up the word like this.
dis + as + tr + ous
Use the word as many times throughout the week. This can be verbally, in your written work or listen out for other people using it.