The term 'LEFT ON BOARD' can be broken down into two words, 'LEFT' and 'ON BOARD'. The word 'LEFT' is a 4-letter word that means to go away from or to abandon something. The word 'ON BOARD' is a 5-letter word that means to be part of something or to accept an offer. Together, the phrase 'LEFT ON BOARD' can be interpreted as leaving something behind or not accepting an offer. This phrase is often used in the context of a job offer, where someone may have been offered a position but decided to turn it down and stay with their current job.