unsplintered
Not broken apart
Unsplintered describes something that remains whole and intact, not broken into sharp fragments.
Wood, bone, or other materials that might splinter stay smooth and unified when unsplintered: The bat cracked but remained unsplintered.
Figuratively, it can describe things that haven't fractured under pressure: an unsplintered coalition, her unsplintered resolve.
whole
Full and undivided
preserved · unblemished · unmarred · uncracked · solid · seamless · unfractured · complete · perfect · sound
polished
Smooth, refined, accomplished
finished · refined · glossy · buffed · planed · unworn · safe · rounded · filed
unsplinteredsplintered
Broken into sharp slivers
shattered · fractured · fragmented · broken · cracked
splinter, splinters, splint, splintered, splintering, splintery, splinted