en_tn_lite_do_not_use/2sa/01/25.md

the mighty

Here this phrase refers to Jonathan. (See: rc://en/ta/man/translate/figs-metonymy)

have fallen

This is a more polite way to say "died." (See: rc://en/ta/man/translate/figs-euphemism)

Jonathan is killed

AT: "Jonathan was killed." (See: rc://en/ta/man/translate/figs-activepassive)

How the mighty have fallen, And the weapons of war perished

These two phrases share similar meanings and are combined for emphasis. Jonathan and his weapons are lost to Israel. (See: rc://en/ta/man/translate/figs-doublet)