Meaning: that which cannot be mitigated, softened, lessened or extenuated.
Usefulness: 2 (It is slightly difficult to enunciate, but if you pull it off much gravitas is achieved: "Such behaviour is immitigable! The chocolate biscuits are sacrosanct, and we must not simply turn a blind eye." I suggest emphatic gestures to accompany the high dudgeon.)
Logofascination: 2
Usefulness: 2 (It is slightly difficult to enunciate, but if you pull it off much gravitas is achieved: "Such behaviour is immitigable! The chocolate biscuits are sacrosanct, and we must not simply turn a blind eye." I suggest emphatic gestures to accompany the high dudgeon.)
Logofascination: 2
