instrumental
— Adjective
– English
～ serving or acting as a means or aid; "instrumental in solving the crime"
insubordinate
— Adjective
– English
～ not submissive to authority; "a history of insubordinate behavior"; "insubordinate boys"
insubordinate
— Adjective
– English
～ disposed to or engaged in defiance of established authority
insubstantial
— Adjective
– English
～ lacking in nutritive value; "an insubstantial and unsatisfying meal"
insubstantial
— Adjective
– English
～ lacking solidity or strength; "a flimsy table"; "flimsy construction"; "vinyl siding has become the standard-bearer for cheap, insubstantial construction"
insubstantial
— Adjective
– English
～ lacking material form or substance; unreal; "as insubstantial as a dream"; "an insubstantial mirage on the horizon"
insufferable
— Adjective
– English
～ too extreme to bear; "the insufferable heat of August in a New York apartment with no air conditioning"
insufferable
— Adjective
– English
～ unbearably arrogant or conceited; "insufferable insolence"
insufficient
— Adjective
– English
～ of a quantity not able to fulfill a need or requirement; "insufficient funds"
insular
— Adjective
– English
～ narrowly restricted in outlook or scope; "little sympathy with parochial mentality"; "insular attitudes toward foreigners"
insular
— Adjective
– English
～ suggestive of the isolated life of an island; "an exceedingly insular man; so deeply private as to seem inaccessible to the scrutiny of a novelist"- Leonard Michaels
insular
— Adjective
– English
～ relating to or characteristic of or situated on an island; "insular territories"; "Hawaii's insular culture"
insulting
— Adjective
– English
～ expressing extreme contempt
insuperable
— Adjective
– English
～ incapable of being surmounted or excelled; "insuperable odds"; "insuperable heroes"
insuperable
— Adjective
– English
～ impossible to surmount
insupportable
— Adjective
– English
～ incapable of being justified or explained
insurable
— Adjective
– English
～ capable of being insured or eligible to be insured
insured
— Adjective
– English
～ covered by insurance; "an insured risk"; "all members of the film cast and crew are insured"
insurgent
— Adjective
– English
～ in opposition to a civil authority or government
insurmountable
— Adjective
– English
～ impossible to surmount