arduo (bn):
zwaar(en) needing or using up much energy.
(en) hard to climb or traverse.
(en) requiring great exertion., moeilijk te beklimmen(en) needing or using up much energy.
(en) hard to climb or traverse., moeizaam(en) needing or using up much energy.
(en) hard to climb or traverse., steil(en) needing or using up much energy.
(en) hard to climb or traverse., uitputtend(en) needing or using up much energy.
(en) hard to climb or traverse., hard(en) requiring great exertion., veeleisend(en) requiring great exertion.
cached Via: Dbnary en WikiWoordenboeken
Via: Memodata.com