This is the 804th most frequent Romanian word.
ucis
"Ucis" means "killed" in English.
In this sentence, 'ucis' is used as the past participle form of 'a ucide', implying the action of killing during a confrontation.
Soldatul a ucis inamicul în bătălie.
The soldier killed the enemy in battle.
'Ucisese' is the pluperfect tense form of 'a ucide', indicating a completed action in the past before another past event.
Ucigașul a fost prins după ce a fost descoperit că ucisese victima.
The murderer was caught after it was discovered he had killed the victim.
Here, 'neucis' uses the prefix 'ne-' for negation, forming an adjective meaning 'undestroyable' or 'invincible' in the context of pain.