Englishfor English speakers
Ac
—
noun
(= actinium)
a radioactive element of the actinide series; found in uranium ores
AC
—
noun
an electric current that reverses direction sinusoidally
In the US most household current is AC at 60 cycles per second
stark
Adjective
—
Is something is stark, it is plain and undecorated, often in a cold or unpleasant way.
All the leaves were gone now, leaving the tree stark and bare.
The house was bare and empty with stark, white walls.
—
A stark contrast, difference, reminder, etc. is simple and clear, often in a cold or unpleasant way.
The contrast between rich and poor is even more stark in health outcomes.
The deaths are a stark reminder of how much family violence there is in the city.
effect
Noun
—
An effect is something that is caused by something else.
His comments had a visible effect on those who heard it.
The effect of the change was small.
—
If a law, agreement, change, etc. takes effect, it officially begins.
The closing of the company takes effect at midnight.
The new rules have been in effect since January.
effect
Verb
—
If you effect a change, you make it happen.
I will effect the change without your help.