akmeņains

Latvian

From akmens (“stone”) +‎ -ains (with n > ņ as a normal feature of this stem; see its declension).

akmeņains (definite akmeņainais, comparative akmeņaināks, superlative visakmeņainākais, adverb akmeņaini)

stony (where there are many stones)
akmeņains tīrums, krasts ― stony field, coast

akmeņaina taka, grava ― stony trail, ravine

kalnu ceļš ir bedrains un akmeņains, bet bezgala skaists ― the mountain road is full of holes and stones, but (also) infinitely beautiful

akmeņainajā apvidū snauda reti kam zināmais ezers ― in the stony region there rarely slumbered a lake known to someone
(figuratively) hard as stone, indifferent, unfeeling
viņš redzēja, ka Sarkalienei, žokļiem drebot, zobi atsitās viens pret otru... bet viņas brūnajās acīs noturējās akmeņains miers ― he saw that Sarkaliene's teeth, (with her) jaws trembling, were hitting each other... but in her brown eyes the stone-hard peace remained