Problems Again - Words I keep forgetting

I did a test yesterday with 99 words. I got 25 of them wrong, and these are the ones which I had most difficulty correcting. I don't know what to do about these words. They keep disappearing out of my head.

Dutch	English	Comments
aanvagen	to begin
de ingewikkeldheid	the complexity, task, difficulty
aangenaam	nice, easy going
tegelijk	simultaneously
ontmoeten	to meet	I keep forgetting the 'ont'. Moeten means must.
gemakkelijk	easy, effortless	I'm not tying this work to its meaning.
tof	great
vroeg	early
voelen	to think	Literally means to feel.
beklemtonen	to emphasise
Anders nog iets?	Anything else?	anders = other, nog=more, iets=something