Ifluent English - Idiom: under the weather Meaning: to be ill. Have you been under the weather recently?

Idioms for IELTS speaking: Idiom examples with their meaning and sentences

Language Techniques Glossary

English Idioms: Top 30 Helpful Expressions for Daily Conversation

Oxford Language Club

The Origins Of 16 Everyday English Phrases That Made Us Say 'Oh!

Why Nonnative English Speakers Actually Speak The Best English : Goats and Soda : NPR

Native spanish expressions

Under the Weather and Other Illness Idioms - SpeakUp resources

BBC Learning English - The English We Speak