先せん天てん性せい

せ

ん

て

ん

せ

い

Meanings

1

noun which may take the genitive case particle 'no', noun

Medical term for conditions present from birth, whether genetic or not. Also used more broadly for innate traits.

彼かれ

は

先せん

天てん

性せい

の

心しん

臓ぞう

病びょう

を

持も

っ

て

いる

。

He has a congenital heart condition.

先せん天てん性せいの才さい能のうというものは確たしかに存そん在ざいする。

Inborn talent certainly exists.

老ろう人じん性せい
先天性 describes a condition present from birth (congenital), while 老人性 describes one that develops with advancing age.

先せん天てん的てきN1
先天性 is a noun (used as 先天性の〜) for medical/biological conditions like diseases, while 先天的 is the na-adjective used more broadly for traits or abilities.
天てん性せい
先天性 looks similar to 天性 but is a technical term for congenital (esp. medical) conditions present from birth, whereas 天性 refers to a person's innate character or talent.

From 先天 (せんてん, 'innate, before birth') + 性 (せい, 'nature, -ity').