word-request
I'm curious to find a word for those who sleep "like a log", very deeply. Those who once asleep are very difficult to wake.
For example in all Iranian languages, there is an expression which translates literally as:
My sleep is heavy.
His sleep is very heavy.
How heavy your sleep is!
In addition, I already found an adjective (sound asleep) which is very rare to use.
Not one word, but this phrase is more natural than saying nearly never.:
One word:
Scarcely (used to qualify a statement by saying that it is true to an insignificant degree). Also used as hardly ever.
Only just; almost not:
Usage graph specific to your context:
There are many words that can be used; that person could be forgetful, or that person could be discourteous. It depends on if you want emphasize the cause or the effect.
discourteous (adj.) showing rudeness and a lack of consideration for other people
absentminded (adj.) (of a person or a person's behavior or manner) having or showing a habitually forgetful or inattentive disposition
My thesaurus lists these promising synonyms for absentminded:
Best Answer
As mentioned in the comments, "sound sleeper" or "heavy sleeper" are both used, specifically in the context of someone who doesn't wake up easily.
"I slept like a log" is the most common idiomatic expression, but usually when you have a deep and restful sleep.