someone has famously titled : Instant Vocabulary – and have sold millions of copies
take that as a Lie, a blatant LIE.
There is no Instant Vocabulary, as many tout.
There can only be Constant Vocabulary, as shakeSpiker tells you squarely & to hold a straight course.
you must work your ass off continually, Constantly, and you haven’t got any other option here .
what is / how much is – 2 + 2 = ?
here it is – 2 + 2 = abc ( not even 123 )
no logic , no sense , absolutely .
take this Vocabulary Test
cur = (1) a dog, worthless, unfriendly one .
(2) a mean, contemptible, cowardly person
–ious = forming adjectives, meaning : characterized by, like , similar to
curious = (1) eager, to learn, know.
eg: students are curious enough to know more on this subject.
(2) inquisitive, prying, meddlesome.
eg : he was very curious with others and a distraction at workplace .
(3) arousing/exciting attention, interest, speculation
because of being unusual, strange, odd.
eg : a curious scene of offence
a curious sort of people.
Logically/Sensibly – curious = meaning ought to be = characteristic of, like – a mean, contemptible, cowardly person.
but you have a radically different meaning assigned .
That’s English .
bring sense to / or rather re’learn again your English afresh – from shakeSpiker .