馃彺 Welsh phrases

How to Say "I don't understand" in Welsh

The SPAIKING TeamJuly 27, 2026
Dydw i ddim yn deall
"I don't understand" in Welsh 路 say it like dud-ee wee dim un deh-al

The most natural way to say "I don't understand" in Welsh is Dydw i ddim yn deall. Tap the speaker above to hear it, then say it back out loud. That is the fastest way to make it stick.

Other ways to say it

Dydw i ddim yn deall o gwbl
This is a stronger way to express complete lack of understanding.
Nid wyf yn deall
A more formal way to say it.

When to use it

Use this phrase when someone is explaining something and you cannot grasp the concept. It is appropriate in both casual and formal settings. You can also use it in a classroom or during a conversation to seek clarification.

Say it out loud, get corrected

Reading it is not the same as saying it. Practice "I don't understand" and thousands more with an AI coach that listens.

Examples in Welsh

WelshEnglish
Mae'r athro'n siarad yn rhy gyflym, dydw i ddim yn deall.The teacher is speaking too fast, I don't understand.
Common mistake
Learners often confuse 'deall' with 'deallai', which is incorrect in this context.

The fastest way to remember it

Vocabulary you only read fades fast. Vocabulary you say out loud sticks. Hear Dydw i ddim yn deall, repeat it a few times, then use it in a real sentence. SPAIKING lets you practice exactly that, speaking Welsh with a coach that corrects your pronunciation in real time. You can start with two free conversations.

Frequently asked questions

How can I ask someone to explain something again?

You can say 'A allwch chi esbonio hynny eto, os gwelwch yn dda?'

Learn Welsh by speaking it

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