Based on the roots and affixes of the words provided, here is the matching of the English words to their related words:
- night - nocturne (Related through the Latin root "noct-," meaning night)
- seven - September (Related through the Latin "septem," meaning seven)
- mother - maternity (Related through the Latin "mater," meaning mother)
- three - tricycle (Related through the Greek root "tri," meaning three)
So the matches are:
- night - nocturne
- seven - September
- mother - maternity
- three - tricycle