The term theirself is not a word. The suffix "self" is only applied to the pronouns my, your, him, or her (singular), and "selves" to our, your, or them (plural)
"I have never seen someone so clearly unaware of himself (or herself)" would be proper form. (But the exact meaning here is still vague : aware of what aspect of himself?)
* Although the Oxford Dictionary, Collins Dictionary, and Chambers Dictionary list the non-gender-specific themself, it is not standard English. Where the gender could be either, it is better to use a different sentence structure to eliminate the "self".
It really depends on what the complete sentence.
The adverb form of clear is clearly.An example sentence is: "he is clearly a bit crazy".
The castanet clicked quickly and clearly.
Apex
I have utter contempt for people who plagiarize this sentence without giving me credit.
It really depends on what the complete sentence.
clearly i went to get bread from the lovely shop
No. In this case, "it" was clearly not held now, and so this is a "contrary to fact condition" calling for the present subjunctive: If it were held now... Grammatically, yes. All a sentence really needs is a noun and a verb, but it doesn't really make sence. It is mixing past, present and future/possible tenses in such a way that is confusing to the ear.
It clearly wasn't his day...Or was it?
Example sentence - His children were clearly ungrateful for the efforts he made for them.
You can use "clearly" to emphasize that something is obvious or easily understood. For example, "She clearly explained the instructions," or "It is clearly stated in the contract."
The adverb form of clear is clearly.An example sentence is: "he is clearly a bit crazy".
Yes, the word clearly is an adverb.An example sentence is: "he could see clearly now that he discovered how to turn on the windscreen wipers".
The kettle was clearly boiling as they could see the steam rising from it.
The auctioneer must speak quickly and clearly.
"The snub was clearly intentional"
The castanet clicked quickly and clearly.