1. Weighing much or hard to carry; heavy.
2. Causing hardship or distress.
Synonyms: burdensome, onerous, oppressive, weighty
These adjectives apply to what causes one to feel weighed down, as with duties, difficulties, or hardships: the burdensome task of preparing a tax return; the onerous chores involved in maintaining a large house; oppressive policies that restricted citizens' freedom; the weighty concerns that troubled the jurors.
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2020 by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Indo-European & Semitic Roots Appendices
Thousands of entries in the dictionary include etymologies that trace their origins back to reconstructed proto-languages. You can obtain more information about these forms in our online appendices:
The Indo-European appendix covers nearly half of the Indo-European roots that have left their mark on English words. A more complete treatment of Indo-European roots and the English words derived from them is available in our Dictionary of Indo-European Roots.