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Daily Newsday Crossword

“Sir __ Newton”

The verified answer to the Newsday Crossword clue “Sir __ Newton”, with letter-by-letter analysis and the full puzzle context for the Sunday, May 10, 2026 puzzle.

Published · Down · 5 letters

Hints first

Letters 5
First letter I
Last letter C
I ? ? ? C

A 5-letter down entry from the Sunday puzzle

The Answer

I S A A C

The answer to “Sir __ Newton” is ISAAC

Letters 5
Direction Down
Published May 10, 2026

Letter analysis: the 5-letter answer

Vowels, consonants, and crossword construction notes
Unique 4 of 5 positions
Vowels 3 60% of word
Consonants 2 non-vowels
First letter I starts with

The clue “Sir __ Newton” appeared in the Newsday Crossword on Sunday, May 10, 2026 as a down entry. The verified answer is ISAAC — a 5-letter word that begins with I and ends with C.

This answer contains 3 vowels and 2 consonants. The Newsday Crossword is published daily by Newsday on Long Island and edited by Stan Newman, whose Saturday Stumper is widely considered one of the toughest mainstream crosswords in print.

Other clues with the answer ISAAC

ISAAC has been used as the answer for these Newsday Crossword clues
“Newton of physics” Feb 10, 2026 “Moses ancestor” Dec 25, 2025 “Genesis father of twins” Nov 30, 2025 “Author Asimov” Sep 14, 2025 “Author Asimov” Aug 13, 2025

More clues from the May 10, 2026 puzzle

Sunday Newsday Crossword
View full puzzle
Slumber 5 ℓ · D Put a new price on 5 ℓ · D Flat-topped land 4 ℓ · D Egyptian snake 3 ℓ · A Online chats, for short 3 ℓ · A Misfortunes 4 ℓ · D Winery device 5 ℓ · D Find a job for 5 ℓ · D Native New Zealander 5 ℓ · D Yale, nostalgically 7 ℓ · D Quaint emporium 6 ℓ · D Quickly 7 ℓ · D Letters in '50s atlases 3 ℓ · D "Spaceflight" prefix 5 ℓ · D Out in the open 5 ℓ · D Curved part of the foot 4 ℓ · D Movie trailer, e.g. 5 ℓ · A Take it easy 5 ℓ · D Bunch of bees 5 ℓ · A Very angry 3 ℓ · D

Frequently asked questions about “Sir __ Newton”

What is the answer to “Sir __ Newton” in the Newsday Crossword?

The verified answer is ISAAC — a 5-letter word that appeared as a down entry on Sunday, May 10, 2026.

How many letters is the answer to “Sir __ Newton”?

The answer ISAAC contains 5 letters.

Was “Sir __ Newton” an across or down clue?

This clue ran as a Down entry.

Is this site affiliated with Newsday?

No. This is an independent fan reference site — we are not affiliated with Newsday. The Newsday Crossword is a trademark of its respective owner. We solve and verify each Newsday Crossword puzzle manually before publishing the answer key.

Sir __ Newton — Newsday Crossword Clue Answer | Newsday Crossword Answers