By the rivers
nahar (naw-hawr')
a stream (including the sea; expec. the Nile, Euphrates, etc.); figuratively, prosperity -- flood, river.
of Babylon
Babel (baw-bel')
confusion; Babel (i.e. Babylon), including Babylonia and the Babylonian empire -- Babel, Babylon.
there we sat down
yashab (yaw-shab')
to sit down (specifically as judge. in ambush, in quiet); by implication, to dwell, to remain; causatively, to settle, to marry
yea we wept
bakah (baw-kaw')
to weep; generally to bemoan -- at all, bewail, complain, make lamentation, more, mourn, sore, with tears, weep.
when we remembered
zakar (zaw-kar')
to mark (so as to be recognized), i.e. to remember; by implication, to mention
Zion
Tsiyown (tsee-yone')
Tsijon (as a permanent capital), a mountain of Jerusalem -- Zion.