Igneous rock formed inside Earth.

(psychology) An unwelcome involuntary thought, image, or idea.

Testing that disrupts normal operations.

Respectful of personal space, boundaries.

(phonetics) An "r" sound that is like a linking r but occurs despite the absence of "r" in the spelling, as in Asia and the Far East in some pronunciations.

Linking R and intrusive R are sandhi phenomena where a rhotic consonant is pronounced between two consecutive vowels with the purpose of avoiding a hiatus, that would otherwise occur in the expressions, such as tuner amp, although in isolation tuner is pronounced the same as tuna (or ) in non-rhotic varieties of English.