Newton

The answer

ISAAC

5 letters. See every clue for this answer on the ISAAC answer page.

Used 16 times across 12 distinct years; most recently in 1977; first recorded in 1944. It appears in 1 publications in the xd corpus. Frequency and last-seen figures come from the xd crossword corpus only.

Other answers for this clue

The same clue has also been answered these ways in the xd corpus. Answers inside this collection link to their own answer page.

• FIG (7 uses in xd)
• WAYNE (1 uses in xd)

Other clues for ISAAC

Every other clue in this collection answered by ISAAC, most used first.

• Sir __ Newton - used 104 times, most recently in 2026
• Violinist Stern - used 66 times, most recently in 2026
• Author Asimov - used 55 times, most recently in 2026
• Stern with a bow - used 51 times, most recently in 2026
• Writer Asimov - used 43 times, most recently in 2024
• Designer Mizrahi - used 37 times, most recently in 2025
• "I, Robot" author Asimov - used 34 times, most recently in 2026
• Abraham's son - used 29 times, most recently in 2022
• Son of Abraham - used 29 times, most recently in 2025
• Scientist Newton - used 22 times, most recently in 2026
• "The Love Boat" bartender - used 21 times, most recently in 2026
• Son of Sarah - used 19 times, most recently in 2016
• Sci-fi author Asimov - used 18 times, most recently in 2026
• Biblical patriarch - used 17 times, most recently in 2024
• Esau's father - used 17 times, most recently in 2024
• Physicist Newton - used 17 times, most recently in 2026
• "Shaft" composer Hayes - used 17 times, most recently in 2024
• Soul singer Hayes - used 16 times, most recently in 2026
• Sci-fi writer Asimov - used 14 times, most recently in 2026
• Newton or Stern - used 13 times, most recently in 2016
• Father of Jacob - used 12 times, most recently in 2022
• Singer Hayes - used 12 times, most recently in 2026
• Asimov of sci-fi - used 11 times, most recently in 2018
• Newton or Hayes - used 11 times, most recently in 2025
• Asimov or Newton - used 10 times, most recently in 2023
• Bartender on "The Love Boat" - used 9 times, most recently in 2023
• Mathematician Newton - used 9 times, most recently in 2010
• Newton of physics - used 9 times, most recently in 2026
• Asimov or Stern - used 8 times, most recently in 2011
• Funk of Funk & Wagnalls - used 8 times, most recently in 2019
• Hayes of "South Park" - used 8 times, most recently in 2008
• Jacob's father - used 8 times, most recently in 2025
• "Shaft" singer Hayes - used 8 times, most recently in 2026
• Bartender on TV's Pacific Princess - used 7 times, most recently in 2024
• Father of Esau and Jacob - used 7 times, most recently in 2019
• Hayes or Stern - used 7 times, most recently in 2022
• Newton with laws - used 7 times, most recently in 2016
• Sarah's son - used 7 times, most recently in 2022
• Biblical father of twins - used 6 times, most recently in 2019
• Fashion designer Mizrahi - used 6 times, most recently in 2026
• "I, Robot" writer Asimov - used 6 times, most recently in 2026
• Ishmael's half-brother - used 6 times, most recently in 2007
• Old Testament patriarch - used 6 times, most recently in 2022

Related clues

Clues in this collection of the same answer length that share a word with this clue, or match its answer pattern when no word is shared. Most used first.

• Perfect - IDEAL, used 405 times
• Silly - INANE, used 305 times
• Furious - IRATE, used 213 times
• Bumbling - INEPT, used 171 times
• Occupied - INUSE, used 165 times
• Notions - IDEAS, used 155 times

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