adj. like·li·er, like·li·est
1. Possessing or displaying the qualities or characteristics that make something probable: They are likely to become angry with him. See Usage Note at liable.
2. Within the realm of credibility; plausible: not a very likely excuse.
3. Apparently appropriate or suitable: There were several likely candidates for the job.
4. Apt to achieve success or yield a desired outcome; promising: a likely topic for investigation.
5. Attractive; pleasant: found a likely spot under a shady tree for the picnic.
Probably: They'll likely buy a new car soon.
[Middle English likly, from Old English gelīclīc (from gelīc, similar) and from Old Norse līkligr (from līkr, similar); see līk- in the Appendix of Indo-European roots.]
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.