To 'reduce' is to make something smaller or less in size, amount, or price.
Explanation
Test of English for International Communication (TOEIC)
If something solid 'melts' or if heat melts it, it becomes liquid.
appropriate - (adj.) correct or suitable for a particular time, situation, or purpose
typical - (adj.) having the usual features or qualities of a particular group or thing
To 'calculate' is to find out how much something will cost, how long something will take etc, by using numbers.
impact - (noun) the effect or influence that an event, situation etc has on someone or something
If a door, gate etc 'slams', or if someone slams it, it shuts with a loud noise.
troops - (noun) soldiers in an organized group
A 'cramped room', building etc does not have enough space for the people in it.
verbose - (adj.) using or containing too many words