prolongeren

Prolongeren is a Dutch verb meaning to prolong, extend, or lengthen the duration, scope, or extent of something. It is used to describe making a period or process longer than originally anticipated, such as a time frame, agreement, or procedure. The term is a loanword from French prolonger, with roots in the Latin prolongare, and it tends to be more formal or technical than the everyday Dutch verb verlengen.

Usage is common in medical, legal, administrative, academic, and translational contexts where precise language is required. In everyday speech, speakers more often use verlengen for general extension, while prolongeren appears in formal reports, research papers, or official documents. The related noun prolongatie (prolongation) is frequently used in professional fields such as medicine or contract law, and the past participle geprolongeerd is used to describe something that has been prolonged.

Grammar and forms follow standard Dutch conjugation for -eren verbs. The present participle is prolongerend, and the past participle is geprolongeerd. For example, one might say the treatment period is geprolongeerd (the treatment period has been prolonged) or the duration was geprolongeerd by two weeks.

See also terms related to extending time or scope, such as verlengen (to lengthen) and prolongatie (prolongation). In translation or bilingual contexts, prolongeren is often used alongside its French or English equivalents to convey a formal sense of extending duration rather than merely increasing size.