OET interlinear LAM 3:42

uW Translation Notes:

Note 1 topic: writing-pronouns

נַ֤חְנוּ פָשַׁ֨עְנוּ֙

we (Some words not found in UHB: we transgressed and,we_have_rebelled you(ms) not forgiven )

The writer is stating the pronoun We separately for emphasis, to highlight the community’s guilt. If a speaker of your language would use an explicit pronoun for the same purpose, you may want to use that construction in your translation. If not, your language may have other ways of showing the meaning here. Alternate translation: [It is we who have transgressed]

Note 2 topic: figures-of-speech / doublet

פָשַׁ֨עְנוּ֙ וּ⁠מָרִ֔ינוּ

(Some words not found in UHB: we transgressed and,we_have_rebelled you(ms) not forgiven )

The terms transgressed and rebelled mean similar things. The writer is using the two terms together for emphasis. If it would be clearer for your readers, you could express the emphasis with a single phrase. Alternate translation: [have sinned greatly against you]