Betray vs River

When to use each in English, with meaning, register, and examples.

Betray

Formal Top 2,000 (common) C1 verb

River

Top 1,000 (very common) A1 noun

Most formal: Betray Most common: River

	Betray	River
Pronunciation	🇬🇧 //bɪˈtreɪ// 🇺🇸 //bɪˈtreɪ//	🇬🇧 /["/ˈrɪvə(r)/"]/ 🇺🇸 /["/ˈrɪvər/"]/
Meaning	to be disloyal or break trust	A large, flowing body of water.
Example	She felt that her best friend would never betray her trust.	The river flows gently through the valley.
Register	Formal	Neutral
How common	Top 2,000 (common)	Top 1,000 (very common)
CEFR level	C1	A1
Part of speech	verb	noun
Collocations	betray someone's trust, betray a confidence, betray an ally, betray one's country, betray one's beliefs	broad, great, large, cross, ford, get across, flow, run, wind, bank, bed, bottom, across a/​the river, along a/​the river, down a/​the river, the banks, bottom, middle, side, surface, etc. of a river, the river’s edge, a bend in the river
Antonyms	loyalty, faithfulness	mountain, desert
Common mistakes	Confusing with 'betrayal' which is a noun., Using it without a clear object; it needs something/someone to betray., Mixing up emotional contexts; 'betray' often carries heavy emotional significance.	Confusing 'river' with 'stream' or 'creek', which are smaller bodies of water., Using 'river' to describe anything other than a flowing water body (e.g., ponds or lakes)., 'Rivers' is often mistakenly used as a singular form when plural., Confusing 'river' with 'sea' or 'ocean', which are much larger bodies of water.
Usage notes	Generally used in formal contexts, it refers to a breach of trust. Avoid in casual conversations.	Used in both formal and informal contexts. It can describe any natural watercourse, but may not be appropriate for small streams or man-made channels.

See it in real clips

You betrayed me.

The Lord Of The Rings › The return of the king

Theoden's betrayed me.

You betrayed me.

The Lord Of The Rings › The return of the king

Theoden's betrayed me.

Betray

Ramelle is on the Merderet River, right here, just to the southwest of us.

The Lord Of The Rings › The return of the king

It's been very quiet across the river.

Ramelle is on the Merderet River, right here, just to the southwest of us.

The Lord Of The Rings › The return of the king

It's been very quiet across the river.

River

Frequently asked questions: Betray vs River

What's the difference between Betray and River?

Betray: to be disloyal or break trust River: A large, flowing body of water.

Which is more formal: Betray and River?

Betray is the most formal of these.

Which is more common: Betray and River?

River is the most common in everyday English.

Which is more advanced: Betray and River?

Betray is the highest level, at C1, on the CEFR scale.

Are Betray and River the same CEFR level?

Betray: C1, River: A1 on the CEFR scale.

What part of speech are Betray and River?

Betray: verb, River: noun.

Can you show an example of each?

Betray: She felt that her best friend would never betray her trust. River: The river flows gently through the valley.

Can I use Betray and River interchangeably?

Not always. Betray and River are related and overlap in some contexts, but they differ in register, how common they are, and usage, so swapping one for another can change the meaning or tone. Check the differences above before substituting.