せつめい
拙い(つたない)、稚拙(ちせつ)、拙速(せっそく)
clumsy, childish/immature, hasty
On-reading (セツ) is used in compounds; kun-reading (つたな(い)) is used standalone or with okurigana. Appears in many compounds — memorize the key ones rather than the kanji in isolation. This kanji forms verbs/adjectives with okurigana. Practice both the word form and compound forms.