Words that come from Proto-Indo-European “h₃erdʰ-”
400 words across 53 languages descend from Proto-Indo-European h₃erdʰ- — including orthodox, Orthodox, orthodoxy, arduous, orthogonal, unorthodox, arbor, orthopedic.
See the etymology of h₃erdʰ- itself →
English (95)
- orthodox
- Orthodox
- orthodoxy
- arduous
- orthogonal
- unorthodox
- arbor
- orthopedic
- Armagh
- ard
- arboreal
- arbuscular
- orthogonality
- orthonormal
- arboretum
- arborescent
- orthogonally
- arduously
- unorthodoxy
- arboriculture
- arborization
- nonorthogonal
- orthogonalization
- arduousness
- arborist
- orthoepy
- arborvitae
- arborescence
- biorthogonal
- ultraorthodox
- nonorthodox
- orthodoxly
- arbored
- arborio
- orthopedically
- arboricultural
- arboreous
- arboriculturist
- orthopteran
- nonorthogonality
- orthogonalize
- stinkard
- orthoepic
- dynamitard
- orthoepist
- arboreality
- orthodoxal
- arboreally
- nonarboreal
- biorthogonality
- periarbuscular
- semiarboreal
- unorthodoxly
- orthoepical
- orthodoxia
- arbustive
- antiorthodox
- reorthogonalization
- arboriform
- unarduous
- orthonormalize
- arborealism
- semiorthogonal
- orthopedical
- biorthonormal
- hyperorthodoxy
- arboricole
- arbuscle
- orthodoxic
- arborway
- biorthonormality
- Conservadox
- orthodoxness
- arborator
- orthodoxally
- arboriculturally
- orthoepically
- biorthogonalization
- reorthogonalize
- arborary
- ortho-
- orthodoxality
- arbust
- ultra-Orthodox
- arborcide
- bioorthogonal
- orthoëpy
- arboresce
- inorthodox
- limpard
- arduity
- subarborescent
- orthodoxize
- orthodoxization
- arbores
Irish (57)
- ard-
- airde
- ard-diúc
- ardeaglais
- comh-airde
- ard-daonscoil
- ardchlár
- oll-ardchlár
- ard
- ortadocsacht
- ortadocsach
- ardréim
- airdemhéadracht
- ard-aire
- ard-aireacht
- ardchaighdeáin
- ardchathaoir
- ardchúirt
- ard-ghiúiré
- Ardmháistir
- ardfholús
- ardiomrá
- ardíomhá
- ardlua
- ardoideachas
- ardmháistreás
- ardmháta
- ard-mhionoifigeach
- ardsagart
- ardteicneolaíocht
- ardtiarna
- ardtréas
- ard-dílseacht
- ardéirim
- ard-reachtaire
- ardghléine
- ardteicniúil
- ardmhinicíocht
- ardmholadh
- ardchultúr
- ardchéimíocht
- ardchríoch
- ardtalamh
- ardbhrú
- ardoifig
- ard-deagánach
- ard-deoise
- ardrí
- airdemhéadar
- meán-ard
- ardán
- ardghlórach
- ardaigh
- ardaitheoir
- ardaitheach
- Ard Mhacha
- arda
Esperanto (31)
French (30)
- arborescence
- orthogonal
- orthopédique
- orthopédie
- ortho-
- arborescent
- arbuste
- orthoépie
- arborer
- ardu
- orthodoxie
- orthogonaliser
- orthogonalisation
- orthopédiste
- orthoépique
- ardûment
- orthodoxe
- orthodoxement
- orthogonalement
- orthogonalité
- arbustif
- arboriser
- arborisation
- désarbrer
- arbre
- hyperarbre
- réorthogonaliser
- arboricole
- ardus
- arbores