taková skalní boudička


Gramatika: skaldní - adj. (from skála); boudička - diminutive of bouda (f.)

anglicky:
"some small kennel made of rock" (Čapek is helping Dáša understand the concept of jeskyně (cave) by comparing it to bouda, a word generally used to refer to a hut, but also to psí bouda (kennel).