An adjective meaning “steep, falling steeply (of river)” derived from primitive ᴹ✶stalrā (Ety/STAL). The [[ilk|initial [s] spirantalized the following [t] to [θ] (“th”)]], and the [[mp|[lr] became [ll]]], as suggested by Helge Fauskanger (AL-Ilkorin/thall).
thalladjective. steep, falling steeply (of river)
taigadjective. steep, tall, deep
An adjective meaning “steep, tall, deep” derived from primitive ᴹ✶taikā (Ety/AYAK, EtyAC/TĀ). The [[ilk|[k] became [g] after a vowel]] as usual.