English Spelling Selection — Identify the correctly spelled adjective meaning ‘‘able and deft’’ (choose the standard form among Skillful, Skillfull, Skilfull, Skilpull) with exam-oriented clarity and SEO detail.

Given data

• Task: Pick the correct spelling of the word meaning able, deft, or expert.
• Options: Skillful, Skillfull, Skilfull, Skilpull

Concept/Approach
Standard American English uses the spelling skillful (with double ‘‘l’’ in the base word ‘‘skill’’ and a single ‘‘l’’ before the suffix ‘‘-ful’’).Note: British English often uses skilful; that variant is not present in the options.

Option-by-option analysis
Skillful — correct American English spelling. ✅Skillfull — adds an extra ‘‘l’’ in the suffix ‘‘-ful’’; nonstandard. ❌Skilfull — drops an ‘‘l’’ in the root and doubles in the suffix; incorrect. ❌Skilpull — letter substitution creates a different, incorrect form. ❌

Memory tip
Root + suffix rule: keep the base ‘‘skill’’ intact, then add ‘‘-ful’’ with one ‘‘l’’ → skillful.

Common pitfalls
Over-doubling the ‘‘l’’ in ‘‘-ful’’ is a frequent error; the suffix contributes only one ‘‘l’’.

Final Answer
Skillful