Je was op zoek naar: impracticable (Frans - Engels)

irréalisable/pas faisable/impracticable/n'est pas possible
not feasible

national courts, acting with hindsight, are not to impose an impracticable burden on governments which are proceeding in good faith.
in conclusion, the committee expressed its opinion that there was no need for a third party expert in equal pay cases as job evaluation is imprecise and subjective.

nous avions une expertise mathématique et informatique dans notre équipe, mais la tache d'écrire un visionneur pour visualiser les données était énorme et impracticable.
we had mathematical and computing expertise in our team, but the task of writing a viewer to visualise the data was a huge and impracticable one.

(1) if for any reason it is impracticable to call a meeting of shareholders of a corporation in the manner in which meetings of those shareholders may be called, or to conduct the meeting in the manner prescribed by the by-laws and this act, or if for any other reason a court thinks fit, the court, on the application of a director, a shareholder entitled to vote at the meeting or the director, may order a meeting to be called, held and conducted in such manner as the court directs. 144.
(1) if for any reason it is impracticable to call a meeting of shareholders of a corporation in the manner in which meetings of those shareholders may be called, or to conduct the meeting in the manner prescribed by the by-laws and this act, or if for any other reason a court thinks fit, the court, on the application of a director, a shareholder entitled to vote at the meeting or the director, may order a meeting to be called, held and conducted in such manner as the court directs.