adj. tar·di·er, tar·di·est
1. Occurring, arriving, acting, or done after the scheduled, expected, or usual time; late.
2. Moving or progressing slowly; sluggish: walking at a tardy pace.
[Alteration of Middle English tardive, slow, from Old French tardif, from Vulgar Latin *tardīvus, from Latin tardus.]
Synonyms: tardy, late, overdue
These adjectives mean not arriving, occurring, acting, or done at the scheduled, expected, or usual time: tardy in making a dental appointment; late for the plane; an overdue bus.
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2018 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.