The English term "insane, lunatic, peculiar, crazy, mad, ridiculous" matches the Dutch term "gek"

other english words that include "lunatic" : dutch :
lunatic bezetene
lunatic krankzinnige
other english words that include "peculiar" : dutch :
peculiar, typical eigenaardig
peculiar raar
strange, curious, peculiar, quaint vreemd
other english words that include "ridiculous" : dutch :
ludicrous, ridiculous belachelijk
ridiculous lachwekkend
ridiculous mal