Wild Olive or African Olive or Brown Olive or Indian Olive * Olienhout * Olea Europaea subsp. cuspidata

https://www.inaturalist.org/taxa/322082-Olea-europaea-cuspidata/browse_photos

By Abu Shawka - Own workTransferred from en.wikipedia, Public Domain, https://commons.wikimedia.org/w/index.php?curid=12527750

It is the ancestor of the cultivated olive. In drier areas, the plant may be less than 1 metre (3 ft 3 in) tall within 5-10 years. The fruit is edible but bitter. 

Common names by http://treesa.org/olea-europaea-subsp-africana/  

• (Afrikaans) Oleenhout, Oleunhout, Olienhout, Olievenhout, Oliewenhout, Olyfboom, Olyfhout, Swartolienhout, Swartolievenhout, Swartolyfhout, Vaalolien, Wilde-olien, Wilde-olienhout, Wildeolyf, Wildeolyfboom, Wildeolyfhout, Ysterhout.  
• (English) African Olive, Coast Assegai, Ironwood, Olive Wood, Wild Olive.

Sources:

(*) https://en.wikipedia.org/wiki/Olea_europaea_subsp._cuspidata
(*) https://pza.sanbi.org/olea-europaea-subsp-africana

(*) http://treesa.org/olea-europaea-subsp-africana/

(*) https://www.inaturalist.org/taxa/322082-Olea-europaea-cuspidata