Welsh Word of the Day: Dibynnu (to depend / to rely)

Some Welsh words are incredibly tricky for me to remember, but today’s word – dibynnu (a verb-noun meaning to depend or to rely) – isn’t one of them! I always link it to the phrase “the bunny,” said as if I were speaking an urban Brooklyn accent. If you can find little memory hooks like this, no matter how silly they seem, they can make learning new vocabulary so much easier!

to depend / to rely

Dibynnu is thought to derive from the Middle Welsh dibynnu of the same spelling, which in turn comes from Proto-Brythonic *dibɨnnɨd, from the Latin dēpendeō. The inflected colloquial forms of the verb-noun can be found below, but be aware that it is just as acceptable to use the corresponding periphrastic forms (e.g. ‘Wnes i ddibynnu = I depended; ‘Wna i ddibynnu = I will depend), especially in colloquial Welsh.

FutureConditionalPast
First person singularDibynna (i)
I will depend
Dibynnwn (i)
I would depend
Dibynnais (i)
I depended
First person pluralDibynnwn (ni)
We will depend
Dibynnen (ni)
We would depend
Dibynnon (ni)
We depended
Second person singular / informalDibynni (di)
You will depend
Dibynnet (ti)
You would depend
Dibynnaist (ti)
You depended
Second person plural / formalDibynnwch (chi)
You will depend
Dibynnech (chi)
You would depend
Dibynnoch (chi)
You depended
Third person singularDibynniff/ Dibynnith (ef/hi)
He / she will depend
Dibynnai (ef/hi)
He/she would depend
Dibynnodd (ef/hi)
He/she depended
Third person pluralDibynnan (nhw)
They will depend
Dibynnen (nhw)
They would depend
Dibynnon (nhw)
They depended

Dibynnu is subject to just two of the three kinds of mutation:

Soft mutation
ddibynnu

Nasal mutation
nibynnu

Aspirate mutation
N/A

When using the word dibynnu, you’ll often see it paired with the prepositions ar (on) and am (for), as in the phrase dibynnu ar (rhywun) am (rhywbeth) – meaning to depend/rely on (someone) for (something). Ar changes form when combined with a pronoun, if a pronoun is present, of course.

  • arnaf fi / arna i = on me
  • arnat ti = on you (singular)
  • arno ef/fe/fo = on him
  • arni hi = on her
  • arnom ni / arnon ni = on us
  • arnoch chi = on you (plural/formal)
  • arnynt hwy = on them (formal)
  • arnyn nhw = on them (colloquial)

I’m relying on you.


A lot of people rely on the mental health network for help.


From dibynnu, we get a number of derived terms that will certainly enrich your vocabulary if you can remember them! Dibynadwy means dependable or reliable, while the opposite is annibynadwy, meaning undependable or unreliable. Dibynnol is the word for dependent, and dibyniaeth is dependence or reliance.

Finally, we have dibyn, which means a precipice or cliff. A cliff, you ask? What does that have to do with depending or relying on something? Well, it all ties back to an older, now obsolete meaning of dibynnu (to hang or dangle). (In modern Welsh, this meaning has mostly been replaced by the verb-nouns hongian and crogi.) Interestingly, when dibyn is used as an adjective, it means hanging, dangling, suspended, or steep. If this little etymological adventure is making you feel a bit dibyn-dobyn (topsy-turvy), I wouldn’t blame you one bit!

Romantic couple smiling while looking into each others eyes with love
Maen nhw’n dibynnu ar ei gilydd.They rely on each other.





About The Author

Heather is passionate about everything language-related. Born and raised in Toronto, Canada, she holds a TEFL certification from Aberystwyth University and a Bachelor's degree in Linguistics from the University of Western Ontario. Along with her native English, she speaks Italian, Welsh, and a smattering of Japanese and French.