arduous (a) (effort) | moeizaam (a) (effort) |
arduous (a) (effort) | zwaar (a) (effort) |
arduous (a) (effort) | moeilijk (a) (effort) |
arduous (a) (effort) | vermoeiend (a) (effort) |
arduous (a) (effort) | veeleisend (a) (effort) |
arduous (a) (effort) | hard (a) (effort) |
arduous (a) (effort) | lastig (a) (effort) |