v. in·trud·ed, in·trud·ing, in·trudes
1. To put or force in inappropriately, especially without invitation, fitness, or permission: intruded opinion into a factual report.
2. Geology To thrust (molten rock) into preexisting rock.
To come in rudely or inappropriately; enter as an improper or unwanted element: "Unpleasant realities have intruded on [his] presidential dreams" (Alexander Stille).
[Middle English intruden, from Latin intrūdere, intrūs-, to thrust in : in-, in; see IN-2 + trūdere, to thrust; see treud- 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.