/ ɪnˈfleksəbl; NAmE / adjective
1.
( disapproving ) that cannot be changed or made more suitable for a particular situation
SYN rigid :
an inflexible attitude / routine / system
2.
( disapproving ) ( of people or organizations ) unwilling to change their opinions, decisions, etc., or the way they do things :
He's completely inflexible on the subject.
3.
( of a material ) difficult or impossible to bend
SYN stiff
OPP flexible
► in·flex·ibil·ity / ɪnˌfleksəˈbɪləti; NAmE / noun [ U ]
► in·flex·ibly / -əbli; NAmE / adverb
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WORD ORIGIN
late Middle English : from Latin inflexibilis , from in- not + flexibilis flexible.