maize

Maize sounds like maze (labyrinth) or amazing.

Here is an amazing maize maze!

sieve

Sieve is pronounced "siv". 

It rhymes with give.

Bonus point:
The one for pasta is called a colander.

 
 
Incorrect:
It's not pronounced "see-v", and the other one is not a noodle sieve.

technical and mechanical

In English, technical and mechanical are pronounced tek-ni-kal and me-ka-ni-kal. Clicking on the words will take you to a dictionary where you can hear the words pronounced.

There is never a soft "ch" in English, like in the German technisch or mechanisch. 

vary, varies, various

Vary rhymes with scary hairy Mary.

Clicking on the words will take you to a dictionary where you can hear the words pronounced.
The "y" sounds like "tree"... 

...not "try"

Varies and various sound like vary but with a "s" and "ous".


Origin of the confusion:

Variety is pronounced differently.

determine

"Determine" sounds like "in"...

...not "mine".