innocuous
Meaning
not harmful or offensive.
(especially of a substance) not likely to cause damage or injury.
Structure
Usage
the spider looked fearsome but was actually quite innocuous.
he made an innocuous comment about the weather to break the ice.
the substance was tested and found to be innocuous to humans.
Etymology
the word 'innocuous' is a direct borrowing from latin innocuus, which itself is formed from the negative prefix in- and the stem nocuus, meaning 'hurtful'. the root noc- traces back to the proto-indo-european base nek-, signifying 'death'. the semantic journey is clear: from the ancient concept of causing death, the root softened to mean causing harm or injury. by adding the negative prefix, the word literally means 'not harmful'. the suffix -uous, a variant of -ous, completes the formation of an adjective describing a quality, solidifying its modern meaning of being safe and inoffensive.
Analysis
in- (latin, prefix meaning 'not'); noc- (latin, from root nek- meaning 'death, harm'); -uous (latin, adjective-forming suffix, variant of -ous meaning 'full of, characterized by').