This is the 11873rd most frequent French word.
suggérée
Suggested.
Here, "suggérée" functions as the past participle used as an adjective, describing the noun "solution" and indicating that it was proposed by someone.
Une solution suggérée par l'équipe a résolu le problème.
A solution suggested by the team solved the problem.
In this case, "suggérée" is also a past participle used as an adjective, qualifying "méthode" to communicate that this method was proposed or recommended.
La méthode suggérée semble être la meilleure option.
The suggested method seems to be the best option.
"Suggérées" describes "idées" and shows plural agreement with its noun, as the past participle matches the gender and number of the noun it modifies.