Antonyms of adj splintery

1 of 2 senses of splintery

Sense 1
splintery -- (subject to breaking into sharp slender pieces)

INDIRECT (VIA breakable) -> unbreakable -- (impossible to break especially under ordinary usage; "unbreakable plastic dinnerwear")

Similarity of adj splintery

2 senses of splintery

Sense 1
splintery -- (subject to breaking into sharp slender pieces)
       => breakable (vs. unbreakable) -- (capable of being broken or damaged; "earthenware pottery is breakable"; "breakable articles should be packed carefully")

Sense 2
splintery, slivery -- (resembling or consisting of or embedded with long slender fragments of (especially) wood having sharp points; "a rough splintery floor of old pine boards")