tuait

/tɥɛ/tuer
1.
verbInd1stImperfectSing3

was killing

killed (habitually or repeatedly)

Le tueur à gages ne tuait jamais ses victimes sans raison.

The hitman never used to kill his victims without a reason.

Synonyms:assassinait, liquidait, éliminait
2.
verbInd1stImperfectSing3

was exhausting (figurative: 'was killing him/her')

was wearing down

Le trajet pour aller au boulot le tuait chaque jour.

The commute to work was killing him every day.

Synonyms:épuisait, achevait, fatiguait