详细解释:a. 坚硬的, 硬的, 难的, 艰苦的, 困难的, 坚固的, 猛烈的, 艰难的, 结实的, 确实的
ad. 坚硬地, 努力地, 辛苦地, 接近地, 猛烈地, 牢固地
【经】 稳定的, 苛刻的
相关词组:
as hard as nails
as hard as the nether millstone
be hard hit by
be hard pressed
be hard put to it to do sth
be hard up for money
go hard with sb
hard and fast
hard at it
hard by
hard done by
hard upon
learn sth the hard way
run sb hard
take sth hard
take it hard
Hard facts prove that...
be in hard condition
be hard at work
hold on hard
look hard at sb
follow hard after sb
as hard as a brick
词型变化：
形容词比较级:harder最高级:hardest词意辨析：
difficult, hard这两个形容词均有“困难”之意。
difficult: 比hard较为正式，侧重需要特别的能力、智力、判断力、技巧或勇气才能克服障碍。也可指深奥或抽象的难题。
hard: 含义广，通俗用词，与easy相对，泛指任何难理解，不好处理或不易做的事。英语解释：
形容词 hard:
not easy; requiring great physical or mental effort to accomplish or comprehend or endure同义词：difficult