Skip to learning

BUILD YOUR VOCABULARY

Word of the Day

Discover a useful word, hear its pronunciation and use it in a sentence.

YOUR WORD COLLECTION

Find your next word.

229 words to explore

Clear all filters

Related to “determine”. Remove related-word filter

Browse words A–Z

See words

Choose a letter to browse the full collection. Numbers show how many words are available.

Verb

ascertain

IPA /ˌæsəˈteɪn/

To find out something with confidence by checking information, asking questions or making a careful effort to investigate.

See example sentence: ascertain

We called the station to ascertain whether the last train was running.

PUT IT INTO PRACTICE

Make one word yours.

Choose a word, say it aloud and write a sentence about your day. Then try a short practice to check your understanding.