adventurous
4 syllablesadventure → adventurous
Willing to try new and exciting things.
“She is an adventurous eater.”
HomeWord endings-ous
EVERYDAY SUFFIXES · -OUS
Words ending
in -ous.
22 classroom words with their roots, meanings and example sentences.
CLASSROOM SELECTION
-ous words, A–Z.
anxious
2 syllablesNo common root word
Worried and nervous.
“She felt anxious about the race.”
courageous
3 syllablescourage → courageous
Brave.
“The courageous dog saved the boy.”
curious
3 syllablesNo common root word
Wanting to know about something.
“The curious cat looked in the box.”
dangerous
3 syllablesdanger → dangerous
Likely to cause harm.
“It is dangerous to cross without looking.”
delicious
3 syllablesNo common root word
Tasting very good.
“The cake was delicious.”
enormous
3 syllablesNo common root word
Very large.
“An enormous whale swam past.”
famous
2 syllablesfame → famous
Known by many people.
“The famous singer waved to the crowd.”
furious
3 syllablesfury → furious
Very angry.
“Dad was furious about the broken window.”
generous
3 syllablesNo common root word
Happy to give or share.
“It was generous of you to share.”
glamorous
3 syllablesglamour → glamorous
Attractive and exciting.
“The film star looked glamorous.”
humorous
3 syllableshumour → humorous
Funny.
“He told a humorous story.”
jealous
2 syllablesNo common root word
Upset because someone has what you want.
“He was jealous of his brother's new bike.”
joyous
2 syllablesjoy → joyous
Full of joy.
“The wedding was a joyous day.”
mountainous
3 syllablesmountain → mountainous
Having many mountains.
“Wales is a mountainous country.”
nervous
2 syllablesnerve → nervous
Worried or afraid.
“I felt nervous before my test.”
obvious
3 syllablesNo common root word
Easy to see or understand.
“The answer was obvious.”
poisonous
3 syllablespoison → poisonous
Containing poison.
“Some mushrooms are poisonous.”
previous
3 syllablesNo common root word
Coming before.
“The previous page has the answer.”
serious
3 syllablesNo common root word
Not joking, or very bad.
“This is a serious problem.”
tremendous
3 syllablesNo common root word
Very large or very good.
“The team made a tremendous effort.”
various
3 syllablesvary → various
Of different kinds.
“The shop sells various sweets.”
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Meanings and examples are written for this site and checked against Merriam-Webster (4 November 2026). Syllable counts come from the CMU Pronouncing Dictionary and can vary with accent. Related endings: -ly words · -ment words · -ity words · -able words · -ness words · -less words · -ful words · -ible words · -ing words · -er words · -est words · -al words · -ive words · -ize words. How we choose words ↗