In the course of his normal work the seaman uses the word strain as meaning the pull or tension on a rope (e.g. 'take the strain' and 'a rope under strain'), which is the sense given in the dictionary.
Ngexesha lomsebenzi oqhelekileyo indoda yaselwandle isebenzisa igama elithi uxinzelelo isingisele ekutsaleni okanye ekuxinzelelni intsontelo (umz. 'thatha uxinzelelo' kunye 'nentsontelo ephantsi koxinzelelo'), elululuvo kwisichazi-magama.