The prophet addresses the sword,
Gather thyself up, O sword, to the right or to the left.
Another rendering is: "Turn thee backwards! get thee to the right! Set thee forwards (?)!get thee to the left! O whither is thy face appointed?

Go thee one way or other - Thou shalt prosper, O sword, whithersoever thou turnest; against Ammon, or Judea, or Egypt.

Go thee (n) one way or other, [either] on the right hand, [or] on the left, wherever thy face [is] set.
(n) Provide for yourself: for you will see God's plague of all parts on this country.

Go thee one way or another,.... Go to some one place: or "unite thyself" (a); to other swords, or join other soldiers holding swords; the address is to the sword, to steer its course some one way, and slay as it goes along, sparing none:
either on the right, or on the left; or south, or north; so the Targum,
"unsheathe, and slay on the south, and destroy on the north:''
whithersoever thy face is set; or prepared, as the Targum, or appointed for destruction; this is the usual interpretation: but why may not the words be an apostrophe to the prophet, to go alone or single, either to the right or left, south or north, as his face was set, Ezekiel 21:2, sighing and crying, smiting his hands together, in order to affect the minds of the people with the sense of their calamities coming upon them?
(a) "unito Montanus", Piscator, Polanus; "unitor te", Starckius; "in unum dirigitor", Cocceius.

Apostrophe to the sword.
Go . . . one way--or, "Concentrate thyself"; "Unite thy forces on the right hand" [GROTIUS]. The sword is commanded to take the nearest route for Jerusalem, "whither their face was set," whether south or north ("right hand or left"), according to where the several parts of the Chaldean host may be.
or other, . . . on the left--rather "set thyself on the left." The verbs are well-chosen. The main "concentration" of forces was to be on "the right hand," or south, the part of Judea in which Jerusalem was, and which lay south in marching from Babylon, whereas the Chaldean forces advancing on Jerusalem from Egypt, of which Jerusalem was north, were fewer, and therefore "set thyself" is the verb used.

Go - O sword, take thy own course.