certain
certain（英 [ˈsɜːtn]，美 [ˈsɜːrtn]），英语单词，作形容词为有把握的；可靠的；无疑的。作代词为某些；某几个。短语搭配有to a certain degree（在一定程度上）。例句为“They are sensitive to certain minerals.（它们对某些矿物质很敏感。）”1
certain形容词类近义词有inevitable、some等，相关反义词有uncertain、unsure等。比较级为more certain。最高级为most certain。
同反义词
同： | [a.] sealed, sure |
反： | [a.] incertain, uncertain, unsealed, unsure |
参考例句
There's a certainlogic to the motion of rush-hour traffic.交通高峰期的运动之间有一种内在联系。
Be certainyour alibi squares with mine.一定要使你的不在犯罪现场的证据与我的证据相符合。
This weekend is certainto be enjoyable.这个周末一定很有意思。
Aspirin is a certaincure for a headache.阿斯匹林是治头痛的妙药。
The Customs excludes certainitems for entry.海关不准某些物品进口。
常用短语
for certain
1.肯定地
英英解释
形容词解释
having or feeling no doubt or uncertainty; confident and assuredfelt certain of success
was sure (or certain) she had seen it
was very sure in his beliefs
sure of her friends
反义词
[同] sure, certain