strenuous (a) (effort) | difficile (a) (effort) |
strenuous (a) (effort) | strenuo (a) (effort) |
strenuous (a) (behavior) | attivo (m) (a) (behavior) |
strenuous (a) (behavior) | fervente (a) (behavior) |
strenuous (a) (effort) | arduo (a) (effort) |
strenuous (a) (effort) | duro (a) (effort) |