operation
It proved to be a very delicate operation to erect the structure given the sometimes strong gusts of wind.
Refuelling in mid-air is a delicate operation as you have to carefully line up the fuel boom with the opening of the fuel tank.
Laser beams can be precisely focused for use in delicate operations such as eye surgery.

SMART Vocabulary: related words and phrases

Fragile and breakable
breakable
brittle
cobwebby
crumbly
delicacy
delicate
dodgy
fissile
flaky
flimsily
flimsiness
flimsy
fragile
fragility
frail
friable
ramshackle
rickety
tenuous
tenuously