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hard to solve

ADJECTIVE
difficult
Synonyms
STRONGEST
complex confusing delicate troublesome
WEAK
abstract abstruse baffling bewildering confounding dark deep enigmatic enigmatical entangled esoteric formidable hard to explain hidden inexplicable intricate involved knotty labyrinthine loose meandering mysterious mystical mystifying nice obscure obstinate paradoxical perplexing problematical profound puzzling rambling subtle tangled thorny ticklish unclear unfathomable unintelligible vexing
Antonyms
STRONGEST
clear easy
WEAK
calm free friendly manageable plain simple sociable straightforward uncomplicated

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Unified has made increased attendance a priority since then, the problem has been hard to solve.

From Los Angeles Times • Sep. 22, 2025

Why is something so simple to state so hard to solve?

From Science Daily • Apr. 2, 2024

Optimal routing is among the prime examples of “NP-hard” problems, the name given to tasks that are at least as hard to solve as the most complex problems from NP.

From Scientific American • Sep. 12, 2023

All sports have issues, and some are hard to solve, such as brain trauma in the NFL or the difficulty of seeing the puck speeding through goalmouth traffic in the NHL.

From Washington Post • Mar. 28, 2023

This is what makes mysteries with Byrd so hard to solve.

From "A Bird Will Soar" by Alison Green Myers

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