This is the 11774th most frequent Turkish word.
gelişmeden
"From the development" or "without development," depending on context.
In this case, 'gelişmeden' describes the origin of the influence, again utilizing the ablative form to link the subject 'being affected' with the source 'a rapid development.'
Bu kadar hızlı bir gelişmeden etkilenmek normaldir.
Being affected by such a rapid development is normal.
In this sentence, 'gelişmeden' refers to a specific development and is used in the ablative case to signify that something stems from, bases upon, or concerns this development.
Bu konuda gelişmeden bahsedilmeli.
The development in this matter should be mentioned.
Here, 'gelişmeden' indicates causation, explaining why new steps were taken, using the ablative suffix to imply causative context.