Question

callous 【callous】adj.1.硬心肠的 2.变硬的（如脚底起硬茧）Only a callous person can see suffering without trying to relieve it.只有硬心肠的人能看到苦难而不设法拯救之。Walking barefoot on the asphalt pavement makes to bottom of your feet callous.赤脚走在柏油上会使你的脚底生茧。

Accepted Answer

['kæləs] 
calloushaving calluses; having skin made tough and thick through wear
A callous person is insensitive or emotionally hardened. If you laugh at your little sister while she's trying to show you her poetry, you're being callous.
Callous comes from the Latin root callum for hard skin.  If you walk barefoot a lot, your feet will become calloused. We usually use callous in the metaphorical sense for emotionally hardened. If someone is unmoved by other people's problems, you might say he shows a callous indifference to human suffering.
All forms of 'callous' will appear on average once every 1716 pages.callositycallouscallousedcallouslycallousness

Front	callous
Pron	['kæləs]
Back	【callous】 adj.1.硬心肠的 2.变硬的（如脚底起硬茧） Only a callous person can see suffering without trying to relieve it. 只有硬心肠的人能看到苦难而不设法拯救之。 Walking barefoot on the asphalt pavement makes to bottom of your feet callous. 赤脚走在柏油上会使你的脚底生茧。
Vocab	calloushaving calluses; having skin made tough and thick through wear A callous person is insensitive or emotionally hardened. If you laugh at your little sister while she's trying to show you her poetry, you're being callous. Callous comes from the Latin root callum for hard skin. If you walk barefoot a lot, your feet will become calloused. We usually use callous in the metaphorical sense for emotionally hardened. If someone is unmoved by other people's problems, you might say he shows a callous indifference to human suffering. All forms of 'callous' will appear on average once every 1716 pages. callosity callous calloused callously callousness

Callous Person Barefoot Feet Emotionally Hardened Kæləs Adj.1.硬心肠的