1. not having the ability, skill, or means to do something
Usage: typically followed by ‘to’ and an infinitive

Examples

• She was unable to attend the meeting due to illness.
• The team was unable to complete the project on time.
• He found himself unable to speak after hearing the news.
• We are unable to process your request at this time.
• The child was unable to reach the top shelf.
• They were unable to agree on a solution.