Ielts vocabulary Masterclass book + ielts listening & Reading Dictionary: Dominate Proficiency Level Vocabulary for ielts listening, Reading, Writing & Speaking

Inconsequential: MEANING: Having little importance; illogical;
haphazard
SENTENCE: Her answers were inconsequential despite the numbering on
the page.
Incorporate : MEANING: Bring something into a larger whole; include
SENTENCE: The second division team incorporated third division players
in the latter half of the season.
Incorrigible: MEANING: A person or behaviour that cannot be reformed
or changed
SENTENCE: My friend’s father is an incorrigible drinker.
Indefatigable: MEANING: Tirelessly persisting
SENTENCE: He had courage, a vivid sense of duty, an indefatigable love
of work, and all the inquisitive zeal and inventive energy of a born
reformer.
Indeterminate: MEANING: Vague and unclear, cannot be determined

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SENTENCE: Our galaxy has an indeterminate number of stars
Indifferent: MEANING: Not caring, unconcerned; mediocre
SENTENCE: Because she felt no desire to marry, she was indifferent to
the constant proposals by her lover.
Indigence: MEANING: A state of extreme poverty; destitution
SENTENCE: After the U.S. Supreme Court case, Gideon v. Wainwright in
1963, state governments were required to provide lawyers to indigent
defendants.
Indolent : MEANING: Lazy, wanting to avoid effort or exertion
SENTENCE: At lunchtime the indolent kids sat around while the active
kids played games.