IPA: /ˌɛn.təˈteɪn.mənt/
KK: /ˌɛntərˈteɪnmənt/
Something that amuses or provides enjoyment, often in the form of performances, shows, or activities.
The concert was a great source of entertainment for the whole family.
Entertainment → It is formed from "inter-" (meaning among or between) and "tenere" (meaning to hold). The word originally referred to holding someone's attention among others, thus providing enjoyment or amusement.
Think of something that 'holds' ('tenere') your attention 'among' others ('inter-') — that's why entertainment means something that amuses or engages you.