Interesting - Thank for drawing my attention! The following is what I can Tell you.
搂 - lou3 = A mother spreading her arms (and hands) to embrace an object - pulling it close to her body (like a mother embracing a baby). This might be described as 'grappling' in English - just as grappling-hooks were once used in the Royal Navy to grip-hold of enemy ships (preventing their free movement) and 'pulling' these structures close so that 'Marines' could then jump onboard, neutralise the enemy crew and take control of their ship!
子 - zi3 = Son, off-spring (children) or 'Master' and 'Teacher' (I think this derives from the legends stating that Laozi - one of the founders of the Daoist religion - was born as an old man with white hair. Daoism advocates a rejuvenating wisdom that purports to create the state of 'Immortality').
Stepping inside the opponent's critical distance and thus 'taking away' their ability to respond effectively. Furthermore, the manner in how the opponent is tripped and thrown involves the deliberate 'hurting' of their body through impat with the ground. This exists within all traditional Chinese gongfu and involves the breaking of fingers and toes, joint dislocation, eye-gouging and groin-kicking. Punching the nose and throat is a basic requirement. A practitioner gets inside the opponent's guard (seen in this video) and takes control of the limbs and torso.
A Master of this art 'prevents' the opponent initiating the smooth rolling seen within modern Judo, Aikido or Jiujitsu - as 'falling' in this context must inflict damage upon the opponent - a punishment considered 'just' within ancient China for starting a fight! This why training in this type of in-fighting requires the ability to roll on an unpadded floor. The inner art is to prevent the intended damage from the fall - by 'countering' its intent through 'correct' placement (usually at speed). This is a key factor within traditional Taijiquan practice.
Shifu Adrian Chan-Wyles (b. 1967) - Lineage (Generational) Inheritor of the Ch'an Dao Hakka Gongfu System.