felmászik (valamire) означает в английский

shin up (something)▼verb
[UK: ʃɪn ʌp] [US: ˈʃɪn ʌp]

swarm up (something)▼verb
[UK: swɔːm ʌp ˈsʌm.θɪŋ] [US: ˈswɔːrm ʌp ˈsʌm.θɪŋ]