adjective

solid, firm, and rigid; not easily broken, bent, or pierced.

the slate broke on the hard floor

firm,solid,dense,rigid,stiff,resistant,unbreakable,inflexible,unpliable,impenetrable,unyielding,solidified,hardened,compact,compacted,steely,tough,strong,stony,rocklike,flinty,close-packed,compressed,as hard as iron,as hard as stone,frozen,adamantine,unmalleable,renitent

adverb

with a great deal of effort.

they work hard at school

diligently,industriously,assiduously,conscientiously,sedulously,busily,intensely,enthusiastically,energetically,earnestly,persistently,doggedly,steadily,indefatigably,untiringly,all out,with application,with perseverance,like mad,like crazy,like billy-o,with difficulty,with effort,after a struggle,painfully,arduously,laboriously

noun

a road leading down across a foreshore.