brittle

(noun) caramelized sugar cooled in thin sheets. Synonyms: toffee, toffy.

(adj) having little elasticity; hence easily cracked or fractured or snapped. Synonyms: brickle, brickly. Examples: "Brittle bones." "Glass is brittle." "`brickle' and `brickly' are dialectal."

(adj) lacking warmth and generosity of spirit. Example: "A brittle and calculating woman."

(adj) (of metal or glass) not annealed and consequently easily cracked or fractured. Synonyms: unannealed.