geest en gemoed

de geest – mind, consciousness; spirit; character
het gemoed – mind, heart

de opstandigheid

de opstand -> opstandig -> de opstandigheid

de opstandigheid – rebellion
de opstand – uprising, revolt, rebellion
opstandig – rebellious, mutinous, insurgent

helaas – unfortunately
het gevolg – consequence
de beperking – cutback; limitation, restriction
omzeilen – to get round, to by-pass

I’ve noticed that some words, which seem to have Latin origin, form their plurals in an unusual way:

Singular: technicus
Plural: technici

Singular: historicus
Plural: historici

Singular: mathematicus
Plural: mathematici

Singular: informaticus
Plural: informatici

Singular: academicus
Plural: academici

Singular: diabeticus
Plural: diabetici

aan de andere kant — on the other hand

Je haalt twee zaken door elkaar. — You are mixing up two things.

eisen – to demand, to require, to claim;
eisen; eiste; geëist — regular verb, however the past participle gets ë.