Frequency: The word is one of the 3000 most common words in English.
1.
An ~ situation, quality, or feeling seems to exist, although you cannot be certain that it does exist.
I was a bit depressed by our ~ lack of progress...
ADJ: ADJ n
2.
If something is ~ to you, it is clear and obvious to you.
It has been ~ that in other areas standards have held up well...
= clear
ADJ: v-link ADJ, oft it v-link ADJ that
3.
If you say that something happens for no ~ reason, you cannot understand why it happens.
The person may become dizzy for no ~ reason.
PHRASE