adhum

noun. bridge

A Doriathrin word for “bridge” appearing in the Addenda and Corrigenda to The Etymologies (EtyAC/YAT), likely a derivative of the same primitive form ᴹ✶yatmā as its cognates in other languages. An earlier deleted form iaðum may indicate Tolkien’s uncertainty over the development of initial [j] (= “y”) in Ilkorin; elsewhere the rule is that [[ilk|initial [j] vanished]].

Changes

• iaðum → aðum ✧ EtyAC/YAT

Cognates

• ᴹQ. yanwe “bridge, joining, isthmus”
• N. ianw “bridge”

Derivations

• ᴹ✶yatmā ✧ Ety/YAT
  • ᴹ√YAT “join” ✧ Ety/YAT

Phonetic Developments

Development	Stages	Sources
ᴹ✶yatmā > aðum	[jatmā] > [jatmē] > [jatme] > [jadme] > [adme] > [aðme] > [aðm] > [aðum]	✧ Ety/YAT

Variations

• aðum ✧ EtyAC/YAT (Dor. aðum)
• iaðum ✧ EtyAC/YAT (Dor. iaðum)