照てれ性しょう

Meanings

Describes a person's disposition: easily embarrassed, self-conscious, or prone to blushing. Often used with ～な人 or ～な性格.

照てれ性しょうな〈人ひと〉a bashful, easily-embarrassed person
彼かれは照てれ性しょうな人ひとで、褒ほめられるとすぐ顔かおが赤あかくなる。
He's a bashful person, and his face turns red as soon as he's praised.
照てれ性しょうな性せい格かくa bashful personality
妹いもうとは照てれ性しょうな性せい格かくで、人ひと前まえで話はなすのが苦にが手てだ。
My little sister has a bashful personality and isn't good at speaking in front of people.
照てれ性しょうで〈動どう詞し〉too bashful to do something
照てれ性しょうでなかなか気き持もちを伝つたえられない。
I'm too bashful to easily tell someone how I feel.

恥はずかしがり屋や
恥ずかしがり屋 is the everyday, colloquial word for a shy person, while 照れ性 sounds slightly more formal and stresses the tendency to blush or become flustered.
内うち気きN2
内気 describes a reserved, introverted personality in general, whereas 照れ性 focuses specifically on becoming embarrassed or flustered in social moments.
シャイN2
シャイ is a casual loanword meaning shy, often used lightly or affectionately, while 照れ性 is a native term describing an ingrained bashful disposition.

大だい胆たんN2
大胆 describes someone bold and unafraid of attention, the opposite of the easily-embarrassed disposition described by 照れ性.

照てれ屋や
照れ屋 is a noun meaning 'a bashful person', while 照れ性 is used adjectivally (照れ性な人) to describe the trait itself.

Compound of 照れ (bashfulness, from verb 照れる 'to be shy/embarrassed') and 性 (nature, disposition).