in·trude (ĭn-trōōd') v.
in·trud·ed, in·trud·ing, in·trudes
v.
tr.
To put or force in inappropriately, especially without invitation, fitness, or permission: intruded opinion into a factual report.
Geology To thrust (molten rock) into preexisting rock.
v.
intr. 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 Indo-European roots.] in·trud'er n.