The heart acts like dry, brittle wood that snaps under the slightest pressure. It crumbles easily instead of staying solid when hit by something heavy.
Example Usage
Thai: เขาใจเสาะ เจอแดดนิดเดียวก็บ่นแล้ว
Transliteration: káo jai sò, joe dàet nít diao gâw bòn láew
Translation: He is so fragile-hearted; he complains after facing just a little bit of sunlight.