kireämpiä
kireämpiä is the comparative form of the Finnish adjective "kireä." The word "kireä" can translate to several meanings in English, including "tight," "tense," "strained," or "stiff." Therefore, "kireämpiä" signifies a greater degree of these qualities.
When used in the plural, "kireämpiä" describes multiple things that are tighter, tenser, more strained, or stiffer