available
牛津词典
adj.
1、(of things 东西) 可获得的；可购得的；可找到的
that you can get, buy or find
2、(of a person 人) 有空的
free to see or talk to people
柯林斯词典
1、ADJ 能找到的；可获得的
If something you want or need is available, you can find it or obtain it.
2、ADJ 有空的;有暇的
Someone who is available is not busy and is therefore free to talk to you or to do a particular task.
朗文词典
adj
1、可用的；可获得的
something that is available is able to be used or can easily be bought or found
2、【not before noun 不用于名词前】（人）有空的
someone who is available is not busy and has enough time to talk to you
unavailable
牛津词典
adj. --反义词：available
[not usually before noun] ~ (to sb/sth)
1、无法得到；难以获得
that cannot be obtained
2、不能（或不愿）见面；不能（或不愿）交谈
not able or not willing to see, meet or talk to sb
柯林斯词典
1、ADJ 弄不到的；得不到的；不方便的
When things or people are unavailable, you cannot obtain them, meet them, or talk to them.
朗文词典
adj
【not before noun 不用于名词前】
1、得不到的
not able to be obtained
2、不能接待的；不愿接待的
not able or willing to meet someone
usable
牛津词典
adj. --反义词：unusable
1、能用的；可用的；适用的
that can be used; in good enough condition to be used
柯林斯词典
1、ADJ-GRADED 可用的；能用的
If something is usable, it is in a good enough state or condition to be used.
朗文词典
adj
1、可用的
something that is usable can be used
unusable
牛津词典
adj. --反义词：usable
1、（破得或差得）不能使用的；破烂不堪的
in such a bad condition or of such low quality that it cannot be used
柯林斯词典
1、ADJ 无用的；不能用的
Something that is unusable is not in a good enough state or condition to be used.
朗文词典
adj
1、（太破旧而）不能使用的
something that is unusable is in such a bad condition that you cannot use it
