time-consuming

time-consuming (comparative more time-consuming, superlative most time-consuming)

1. Using significant amounts of time, especially in an unwanted and sometimes unwarranted manner.
   • 2019, Li Huang, James Lambert, “Another Arrow for the Quiver: A New Methodology for Multilingual Researchers”, in Journal of Multilingual and Multicultural Development, →DOI, page 11:

     However, given current sensibilities about individual privacy and data protection, the recording of oral data is becoming increasingly onerous for researchers who are obliged to navigate an often time-consuming and complex series of administrative requirements and corollary review processes in order to be granted ethics clearance.

   • 2025 May 2, Elisabeth Buchwald and Ramishah Maruf, “A massive tariff on millions of Americans’ purchases just went into effect — cue the chaos”, in CNN‎^[1]:

     The de minimis exemption, as it’s known, allowed shipments of goods worth $800 or less to come into the United States duty-free, often more or less skipping time-consuming inspections and paperwork.

• chronophagous (rare)
• time-intensive (neutral form)
• time-taking (dated)