PS

*ˀrk - to be long (Nöldeke 1886:724, DRS 33)

Akkadian
arku - long, tall (CAD A₂ 283, AHw. 69)
Ugaritic
ˀrk - long (DUL 102)
Hebrew
ˀārōk - long, extending; long-lasting (HALOT 88)
Jewish Babylonian Aramaic
arīḵ - tall, long (DJBA 167)
Syriac
ˀarrīk - longus (LSyr. 49, SL 99)

SL 99: 'long'.

Mandaic
arika - long (MD 37)
Turoyo
yarixo - lang (RW 574)
Arabic
ˀrk - to keep in a place, to remain, to continue (Lane 50)
Sabaic
ˀrk - duration of time (SD 7)