obtrusion

This term carries a strong connotation of unwelcome intrusion or imposition. When used in a social or professional context, it suggests a lack of tact or a disregard for boundaries, implying that the forced entry of an idea or person is irritating or inappropriate. It is more formal and carries a heavier sense of "forcing" than the word "intrusion."

In physical or geological contexts, the word shifts from a social judgment to a descriptive term for protrusion. It describes the mechanical act of something pushing through a surface or layer. While "intrusion" is also used in geology, "obtrusion" specifically emphasizes the resulting state of being conspicuous or prominent.