The word for things that break into pieces is ΑΘΡΑΥΣΤΟΣ sing. masc.. ΑΘΡΑΥΣΤΗ sing fem. ΑΘΡΑΥΣΤΟ sing neut. ΑΘΡΑΥΣΤΟΙ plur masc. ΑΘΡΑΥΣΤΕΣ plur fem. ΑΘΡΑΥΣΤΑ plur neut. .

If you mean that word for people that have not been tamed or intimidated then ΑΔΑΜΑΣΤΟΣ ΑΔΑΜΑΣΤΗ ΑΔΑΜΑΣΤΟ, sing . ΑΔΑΜΑΣΤΟΙ ΑΔΑΜΑΣΤΑΙ ΑΔΑΜΑΣΤΑ plur.

A far more ancient word is ΑΤΜΗΤΟΣ but this one means more someone that has not been cut into pieces.

NOTE. Kansasfan is correct in his/her contribute and ΑΡΡΑΓΗΣ sing masc + fem ΑΡΡΑΓΕΣ sing neut, are the roots of the word ΑΡΡΗΚΤΟΣ masc ΑΡΡΗΚΤΗ fem, ΑΡΡΗΚΤΟ neut. which can also be more to the point.

?θραυστο? (adjective, masculine)

And it is pronounced áthrafstos.

The feminine is ?θραυστη pronounced áthrafsti

The neuter is ?θραυστο pronounced áthrafsto

In capital letters: ?ΘΡΑΥΣΤΟΣ, ?ΘΡΑΥΣΤΗ and ?ΘΡΑΥΣΤΟ

I think the most "ancient" version is

αρραγ??

?θραυστο? (adjective, masculine)

http://www.perseus.tufts.edu/hopper/morp...

This might be modern, but

αν?κητο?

I have a feeling this is for a tatoo... -_-