Definition from Wiktionary, the free dictionary
- In an unassailable manner.
2014 January 21, Hermione Hoby, “Julia Roberts interview for August: Osage County – 'I might actually go to hell for this ...': Julia Roberts reveals why her violent, Oscar-nominated performance in August: Osage County made her feel 'like a terrible person' [print version: 'I might actually go to hell for this ...' (18 January 2014, p. R4)]”, The Daily Telegraph (Review):
- [H]owever hard she pushed the tough-talkin' shtick, she remained doe-eyed, glowing and somehow unassailably demure.
in an unassailable manner