A particle glossed “don’t” in the phrase bâ kitabdahê “Don’t touch me!”. It may be a derivative of the Elvish root ᴹ√AB “refuse, deny, say no”, as suggested by Helge Fauskanger (AL/Adûnaic). Carl Hostetter and Patrick Wynne suggested (VSH/25, AAD/13) it is an example of the optative mood mentioned by Tolkien SD/439, where “optative” is an expression of a desire or wish. If so, it expresses a negative wish. A positive wish might be expressed by the particle du.
* -akpreposition. away
A suffix in the word êphalak “far away”, a derivative of êphal “far” (SD/247). Some authors have suggested that -ak is an intensive suffix “very” instead of suffix meaning “away” (LGtAG, NBA/32). However, the corresponding Quenya word vahai(y)a “far away” is a combination va “(away) from” and haiya “far”, so it seems to me that the literal translation “away” is more likely to be correct (this translation of va was published after LGtAG and NBA were written).