Proto-IE: *wal-, *wal-n-, -m- (Gr hw-)
Meaning: stick, stake
Old Indian: vāṇá- m. `arrow'
Old Greek: hǟ̂lo-s m. `Nagel, Nagelkopf, nagelahnliche Erhöhung'; *wallo-s: gá́lloi = hē̂loi Hsch.
Latin: vallus, -ī m. `Pfahl, Schanzpfahl'; vallum, -ī n. `Pfahlwerk, Verschanzung'
Celtic: OIr fēlmae `saepes', MIr fāl `Zaun, Gehege'; Cymr gwawl `murus, vallum', Bret goalenn `virga'
Russ. meaning: палка, кол, штакетина
References: WP I 298 f
